FS-8195 Compatibility with Solaris 11 process privileges

Now the daemon manages its privileges correctly, so that -rp, -u,
-g and -lp can be supported, also in a Solaris zone.

Also fixed a problem that switch_log_printf() was used before the
logger was initialized, so the messages were sent to nowhere.

src/switch.c

@@ -1089,6 +1089,10 @@ int main(int argc, char *argv[])
 		reincarnate_protect(reincarnate_reexec ? argv : NULL);
 #endif
 
+	if (switch_core_set_process_privileges() < 0) {
+		return 255;
+	}
+	
 	switch (priority) {
 	case 2:
 		set_realtime_priority();