pgsql: Move most /contrib README files into SGML.

Log Message:
-----------
Move most /contrib README files into SGML. Some still need conversion
or will never be converted.

Modified Files:
--------------
pgsql/doc/src/sgml:
filelist.sgml (r1.51 -> r1.52)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/filelist.sgml?r1=1.51&r2=1.52)
postgres.sgml (r1.83 -> r1.84)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/postgres.sgml?r1=1.83&r2=1.84)

Added Files:
-----------
pgsql/doc/src/sgml:
adminpack.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/adminpack.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
btree-gist.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/btree-gist.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
buffercache.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/buffercache.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
chkpass.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/chkpass.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
contrib.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/contrib.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
cube.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/cube.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
dblink.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/dblink.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
earthdistance.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/earthdistance.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
freespacemap.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/freespacemap.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
fuzzystrmatch.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/fuzzystrmatch.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
hstore.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/hstore.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
intagg.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/intagg.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
intarray.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/intarray.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
isn.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/isn.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
lo.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/lo.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
ltree.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ltree.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
oid2name.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/oid2name.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
pageinspect.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pageinspect.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
pgbench.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgbench.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
pgcrypto.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgcrypto.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
pgrowlocks.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgrowlocks.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
pgstattuple.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgstattuple.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
seg.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/seg.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
sslinfo.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/sslinfo.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
standby.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/standby.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
tablefunc.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/tablefunc.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
trgm.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/trgm.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
uuid-ossp.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/uuid-ossp.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
vacuumlo.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/vacuumlo.sgml?rev=1.1&content-type=text/x-cvsweb-markup)
xml2.sgml (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xml2.sgml?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
pgsql/contrib/adminpack:
README.adminpack
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/adminpack/README.adminpack)
pgsql/contrib/btree_gist:
README.btree_gist
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/btree_gist/README.btree_gist)
pgsql/contrib/chkpass:
README.chkpass
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/chkpass/README.chkpass)
pgsql/contrib/cube:
README.cube
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/README.cube)
pgsql/contrib/dblink:
README.dblink
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/dblink/README.dblink)
pgsql/contrib/earthdistance:
README.earthdistance
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/earthdistance/README.earthdistance)
pgsql/contrib/fuzzystrmatch:
README.fuzzystrmatch
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/fuzzystrmatch/README.fuzzystrmatch)
README.soundex
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/fuzzystrmatch/README.soundex)
pgsql/contrib/hstore:
README.hstore
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/hstore/README.hstore)
pgsql/contrib/intagg:
README.int_aggregate
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intagg/README.int_aggregate)
pgsql/contrib/intarray:
README.intarray
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/README.intarray)
pgsql/contrib/isn:
README.isn
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/isn/README.isn)
pgsql/contrib/lo:
README.lo
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/lo/README.lo)
pgsql/contrib/ltree:
README.ltree
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/ltree/README.ltree)
pgsql/contrib/oid2name:
README.oid2name
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/oid2name/README.oid2name)
pgsql/contrib/pageinspect:
README.pageinspect
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pageinspect/README.pageinspect)
pgsql/contrib/pg_buffercache:
README.pg_buffercache
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_buffercache/README.pg_buffercache)
pgsql/contrib/pg_freespacemap:
README.pg_freespacemap
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_freespacemap/README.pg_freespacemap)
pgsql/contrib/pg_standby:
README.pg_standby
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_standby/README.pg_standby)
pgsql/contrib/pg_trgm:
README.pg_trgm
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_trgm/README.pg_trgm)
pgsql/contrib/pgbench:
README.pgbench
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pgbench/README.pgbench)
pgsql/contrib/pgcrypto:
README.pgcrypto
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pgcrypto/README.pgcrypto)
pgsql/contrib/pgrowlocks:
README.pgrowlocks
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pgrowlocks/README.pgrowlocks)
pgsql/contrib/pgstattuple:
README.pgstattuple
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/pgstattuple/README.pgstattuple)
pgsql/contrib/seg:
README.seg
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/README.seg)
pgsql/contrib/sslinfo:
README.sslinfo
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/sslinfo/README.sslinfo)
pgsql/contrib/tablefunc:
README.tablefunc
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tablefunc/README.tablefunc)
pgsql/contrib/uuid-ossp:
README.uuid-ossp
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/uuid-ossp/README.uuid-ossp)
pgsql/contrib/vacuumlo:
README.vacuumlo
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/vacuumlo/README.vacuumlo)
pgsql/contrib/xml2:
README.xml2
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/README.xml2)