Some patches to enhance the contrib build

Hi PostgreSQL developers!

The current Debian package has some patches that tweak the building of
contrib modules. I think they would be interesting for other
distributions, too. Most of this stuff was contributed by users who
actually use these modules.

25contrib-dbmirror:
- additionally install some useful scripts and data files

25contrib-enablemysql:
- enable mysql module build
- add Makefile
- fix hashbang of mysql2pgsql

25contrib-enableoracle:
- enable oracle module build
- add Makefile
- patch ora2pg.pl to look for Ora2Pg.pm additionally in the path
where ora2pg.pl is installed

25contrib-enablexml:
- enable xml module build
- Makefile: add CFLAGS for "-I/usr/include/libxml2" to allow building

26dbf2pg-errorcheck:
- add better error checking to dbf2pg

27dbf2pg-textfield:
- add dbf2pg support for the dbase field 'M' which corresponds to
PostgreSQL's TEXT field

Do you consider adopting them in the official version?

Thanks a lot and have a nice day!

Martin
--
Martin Pitt http://www.piware.de
Ubuntu Developer http://www.ubuntulinux.org
Debian GNU/Linux Developer http://www.debian.org