pgsql-server: Create a C version of pg_config.

Log Message:
-----------
Create a C version of pg_config.

Andrew Dunstan

Modified Files:
--------------
    pgsql-server/src/bin/pg_config:
        Makefile (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/pg_config/Makefile.diff?r1=1.7&r2=1.8)
    pgsql-server/src/include:
        port.h (r1.46 -> r1.47)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/port.h.diff?r1=1.46&r2=1.47)
    pgsql-server/src/port:
        Makefile (r1.15 -> r1.16)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/Makefile.diff?r1=1.15&r2=1.16)
        path.c (r1.25 -> r1.26)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/path.c.diff?r1=1.25&r2=1.26)

Removed Files:
-------------
    pgsql-server/src/bin/pg_config:
        pg_config.sh
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/pg_config/pg_config.sh)