Thread: pgsql: Remove use of "miscadmin.h" in port C files and remove test for

Log Message:
-----------
Remove use of "miscadmin.h" in port C files and remove test for frontend
in miscadmin.h.

Modified Files:
--------------
    pgsql/src/include:
        miscadmin.h (r1.170 -> r1.171)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/miscadmin.h.diff?r1=1.170&r2=1.171)
    pgsql/src/port:
        dirmod.c (r1.30 -> r1.31)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/dirmod.c.diff?r1=1.30&r2=1.31)
        exec.c (r1.29 -> r1.30)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/exec.c.diff?r1=1.29&r2=1.30)