pgsql: DTrace support, with a small initial set of probes by Robert Lor

Log Message:
-----------
DTrace support, with a small initial set of probes

by Robert Lor

Modified Files:
--------------
    pgsql:
        configure (r1.497 -> r1.498)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.497&r2=1.498)
        configure.in (r1.468 -> r1.469)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.468&r2=1.469)
    pgsql/doc/src/sgml:
        installation.sgml (r1.258 -> r1.259)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml.diff?r1=1.258&r2=1.259)
    pgsql/src:
        Makefile.global.in (r1.224 -> r1.225)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/Makefile.global.in.diff?r1=1.224&r2=1.225)
    pgsql/src/backend:
        Makefile (r1.116 -> r1.117)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/Makefile.diff?r1=1.116&r2=1.117)
    pgsql/src/backend/access/transam:
        xact.c (r1.223 -> r1.224)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xact.c.diff?r1=1.223&r2=1.224)
    pgsql/src/backend/storage/lmgr:
        lock.c (r1.168 -> r1.169)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/lock.c.diff?r1=1.168&r2=1.169)
        lwlock.c (r1.41 -> r1.42)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/lwlock.c.diff?r1=1.41&r2=1.42)
    pgsql/src/include:
        c.h (r1.206 -> r1.207)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h.diff?r1=1.206&r2=1.207)
        pg_config.h.in (r1.98 -> r1.99)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.in.diff?r1=1.98&r2=1.99)

Added Files:
-----------
    pgsql/src/backend/utils:
        probes.d (r1.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/probes.d?rev=1.1&content-type=text/x-cvsweb-markup)
    pgsql/src/include:
        pg_trace.h (r1.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_trace.h?rev=1.1&content-type=text/x-cvsweb-markup)