pgsql-server: Per previous discussions, here are two functions to send

Log Message:
-----------
Per previous discussions, here are two functions to send INT and TERM
(cancel and terminate) signals to other backends.   They permit only INT
and TERM, and permits sending only to postgresql backends.

Magnus Hagander

Modified Files:
--------------
    pgsql-server/src/backend/storage/ipc:
        sinval.c (r1.63 -> r1.64)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/storage/ipc/sinval.c.diff?r1=1.63&r2=1.64)
    pgsql-server/src/backend/utils/adt:
        misc.c (r1.33 -> r1.34)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/misc.c.diff?r1=1.33&r2=1.34)
    pgsql-server/src/include/catalog:
        catversion.h (r1.232 -> r1.233)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/catalog/catversion.h.diff?r1=1.232&r2=1.233)
        pg_proc.h (r1.333 -> r1.334)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/catalog/pg_proc.h.diff?r1=1.333&r2=1.334)
    pgsql-server/src/include/storage:
        sinval.h (r1.34 -> r1.35)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/storage/sinval.h.diff?r1=1.34&r2=1.35)
    pgsql-server/src/include/utils:
        builtins.h (r1.240 -> r1.241)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/utils/builtins.h.diff?r1=1.240&r2=1.241)