pgsql: Officially decouple FUNC_MAX_ARGS from INDEX_MAX_KEYS, and set

Log Message:
-----------
Officially decouple FUNC_MAX_ARGS from INDEX_MAX_KEYS, and set the
former to 100 by default. Clean up some of the less necessary
dependencies on FUNC_MAX_ARGS; however, the biggie (FunctionCallInfoData)
remains.

Modified Files:
--------------
pgsql/doc/src/sgml:
runtime.sgml (r1.311 -> r1.312)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/runtime.sgml.diff?r1=1.311&r2=1.312)
pgsql/src/backend/access/transam:
xlog.c (r1.182 -> r1.183)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c.diff?r1=1.182&r2=1.183)
pgsql/src/backend/catalog:
pg_aggregate.c (r1.70 -> r1.71)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/pg_aggregate.c.diff?r1=1.70&r2=1.71)
pg_operator.c (r1.88 -> r1.89)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/pg_operator.c.diff?r1=1.88&r2=1.89)
pgsql/src/backend/commands:
proclang.c (r1.57 -> r1.58)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/proclang.c.diff?r1=1.57&r2=1.58)
trigger.c (r1.182 -> r1.183)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/trigger.c.diff?r1=1.182&r2=1.183)
typecmds.c (r1.67 -> r1.68)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/typecmds.c.diff?r1=1.67&r2=1.68)
pgsql/src/backend/parser:
parse_func.c (r1.175 -> r1.176)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_func.c.diff?r1=1.175&r2=1.176)
pgsql/src/backend/tcop:
fastpath.c (r1.78 -> r1.79)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/fastpath.c.diff?r1=1.78&r2=1.79)
pgsql/src/backend/utils/adt:
arrayfuncs.c (r1.118 -> r1.119)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/arrayfuncs.c.diff?r1=1.118&r2=1.119)
pgsql/src/backend/utils/fmgr:
fmgr.c (r1.91 -> r1.92)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/fmgr/fmgr.c.diff?r1=1.91&r2=1.92)
pgsql/src/bin/pg_controldata:
pg_controldata.c (r1.21 -> r1.22)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_controldata/pg_controldata.c.diff?r1=1.21&r2=1.22)
pgsql/src/bin/pg_resetxlog:
pg_resetxlog.c (r1.29 -> r1.30)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_resetxlog/pg_resetxlog.c.diff?r1=1.29&r2=1.30)
pgsql/src/include/catalog:
pg_control.h (r1.19 -> r1.20)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_control.h.diff?r1=1.19&r2=1.20)
pgsql/src/include:
pg_config_manual.h (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config_manual.h.diff?r1=1.15&r2=1.16)