New NOTIFY trap (IPC call) to send queued notification messages.

The call works. Permission check, restriction of outstanding notifications
to be added. Low level code to make it work from within interrupt handlers
will be added as well.

servers/pm/misc.c

@@ -36,6 +36,7 @@ PUBLIC int do_getsysinfo()
  *=====================================================================*/
 PUBLIC int do_getprocnr()
 {
+  mp->mp_reply.procnr = who;
   return(OK);
 }
 

servers/pm/param.h

@@ -6,6 +6,7 @@
 #define grp_id		m1_i1
 #define namelen		m1_i1
 #define pid		m1_i1
+#define procnr		m1_i1
 #define seconds		m1_i1
 #define sig		m6_i1
 #define stack_bytes	m1_i2