pgsql: Remove dead ports

Remove dead ports

Remove the following ports:

- dgux
- nextstep
- sunos4
- svr4
- ultrix4
- univel

These are obsolete and not worth rescuing. In most cases, there is
circumstantial evidence that they wouldn't work anymore anyway.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/f2f9439fbfba378cb64cd6e5a046e0184cd542c6

Modified Files
--------------
configure | 9 ---
configure.in | 9 ---
doc/src/sgml/installation.sgml | 6 +-
src/Makefile.shlib | 12 ----
src/backend/main/main.c | 4 -
src/backend/port/dynloader/dgux.c | 6 --
src/backend/port/dynloader/dgux.h | 44 -------------
src/backend/port/dynloader/irix.h | 2 +-
src/backend/port/dynloader/nextstep.c | 84 -------------------------
src/backend/port/dynloader/nextstep.h | 26 --------
src/backend/port/dynloader/sunos4.c | 7 --
src/backend/port/dynloader/sunos4.h | 46 --------------
src/backend/port/dynloader/svr4.c | 7 --
src/backend/port/dynloader/svr4.h | 46 --------------
src/backend/port/dynloader/ultrix4.c | 67 --------------------
src/backend/port/dynloader/ultrix4.h | 109 ---------------------------------
src/backend/port/dynloader/univel.c | 7 --
src/backend/port/dynloader/univel.h | 49 ---------------
src/backend/port/dynloader/unixware.h | 2 +-
src/backend/port/nextstep/Makefile | 17 -----
src/backend/port/nextstep/port.c | 62 -------------------
src/include/port/dgux.h | 3 -
src/include/port/nextstep.h | 19 ------
src/include/port/sunos4.h | 7 --
src/include/port/svr4.h | 3 -
src/include/port/ultrix4.h | 57 -----------------
src/include/port/univel.h | 8 ---
src/include/storage/s_lock.h | 13 ----
src/makefiles/Makefile.dgux | 9 ---
src/makefiles/Makefile.sunos4 | 12 ----
src/makefiles/Makefile.svr4 | 15 -----
src/makefiles/Makefile.ultrix4 | 11 ---
src/makefiles/Makefile.univel | 10 ---
src/template/dgux | 1 -
src/template/nextstep | 5 --
src/template/sunos4 | 7 --
src/template/univel | 2 -
37 files changed, 5 insertions(+), 798 deletions(-)