missing IMAP entry in showproto

--- fetchmail-5.6.6/env.c       Wed Feb 14 12:06:01 2001
+++ fetchmail-5.6.6-tas/env.c   Sat Feb 17 18:16:16 2001
@@ -209,6 +209,9 @@
     case P_APOP: return("APOP");
     case P_RPOP: return("RPOP");
 #endif /* POP3_ENABLE */
+#ifdef IMAP_ENABLE
+    case P_IMAP: return("IMAP");
+#endif /* IMAP_ENABLE */
 #ifdef ETRN_ENABLE
     case P_ETRN: return("ETRN");
 #endif /* ETRN_ENABLE */