Fixed a couple of typos.

ctrl/mailproc.cfg

-; Mail Processing Configuration
+; External Mail Processing Configuration
 ;
 ; command-line specifiers (variables) available in command-lines:
 ;
@@ -13,7 +13,7 @@
 ;     %z text dir
 ;
 ;     %o sysop name
-;     %q sytem QWK-ID
+;     %q system QWK-ID
 ;     %v Synchronet version
 ;     %? platform
 ;     %% percent symbol