pgbouncer - pgbouncer: doc updates - check if asciidoc & xmlto - accept

Log Message:
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doc updates

- check if asciidoc & xmlto
- accept only asciidoc >= 8.2
- include generated mapages in cvs
- disable generation rules if tools are not available
- add </variablelist> hack to fixman

Modified Files:
--------------
pgbouncer:
configure.ac (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/configure.ac.diff?r1=1.14&amp;r2=1.15)
config.mak.in (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/config.mak.in.diff?r1=1.3&amp;r2=1.4)
Makefile (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/Makefile.diff?r1=1.9&amp;r2=1.10)
pgbouncer/doc:
Makefile (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/Makefile.diff?r1=1.4&amp;r2=1.5)
fixman.py (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/fixman.py.diff?r1=1.1&amp;r2=1.2)

Added Files:
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pgbouncer/doc:
pgbouncer.1 (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.1?rev=1.1&amp;content-type=text/x-cvsweb-markup)
pgbouncer.5 (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/doc/pgbouncer.5?rev=1.1&amp;content-type=text/x-cvsweb-markup)