pgsql: Add inheritable ACE when creating a restricted token for

Log Message:
-----------
Add inheritable ACE when creating a restricted token for execution on
Win32.

Also refactor the code around it to be more clear.

Jesse Morris

Modified Files:
--------------
    pgsql/src/bin/initdb:
        initdb.c (r1.176 -> r1.177)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/initdb/initdb.c?r1=1.176&r2=1.177)
    pgsql/src/bin/pg_ctl:
        pg_ctl.c (r1.114 -> r1.115)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_ctl/pg_ctl.c?r1=1.114&r2=1.115)
    pgsql/src/include:
        port.h (r1.126 -> r1.127)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/port.h?r1=1.126&r2=1.127)
    pgsql/src/port:
        exec.c (r1.64 -> r1.65)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/port/exec.c?r1=1.64&r2=1.65)
    pgsql/src/test/regress:
        pg_regress.c (r1.64 -> r1.65)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/pg_regress.c?r1=1.64&r2=1.65)