Create aliases for the MAILW:<num>, MAILP:<num>, and SPAMW:<num> @-codes:

  MAILW#<num>, MAILP#<num>, SPAMW#<num>

These codes, unlike the colon-variants, can be combined with format modifiers
(e.g. -L, etc.).

src/sbbs3/atcodes.cpp

@@ -1055,17 +1055,17 @@ const char* sbbs_t::atcode(char* sp, char* str, size_t maxlen)
 		return(str);
 	}
 
-	if(!strncmp(sp,"MAILW:",6)) {
+	if(!strncmp(sp,"MAILW:",6) || !strncmp(sp,"MAILW#",6)) {
 		safe_snprintf(str,maxlen,"%u",getmail(&cfg,atoi(sp+6), /* Sent: */FALSE, /* attr: */0));
 		return(str);
 	}
 
-	if(!strncmp(sp,"MAILP:",6)) {
+	if(!strncmp(sp,"MAILP:",6) || !strncmp(sp,"MAILP#",6)) {
 		safe_snprintf(str,maxlen,"%u",getmail(&cfg,atoi(sp+6), /* Sent: */TRUE, /* attr: */0));
 		return(str);
 	}
 
-	if(!strncmp(sp,"SPAMW:",6)) {
+	if(!strncmp(sp,"SPAMW:",6) || !strncmp(sp,"SPAMW#",6)) {
 		safe_snprintf(str,maxlen,"%u",getmail(&cfg,atoi(sp+6), /* Sent: */FALSE, /* attr: */MSG_SPAM));
 		return(str);
 	}