Spelling fixes.

@@ -137,7 +137,7 @@ imap4d_select_status ()
   io_untagged_response (RESP_OK, "[UIDNEXT %lu] Predicted next uid",
 	                   (unsigned long) uidnext);
   if (unseen)
-    io_untagged_response (RESP_OK, "[UNSEEN %lu] first unseen messsage",
+    io_untagged_response (RESP_OK, "[UNSEEN %lu] first unseen message",
 	                     (unsigned long) unseen);
   io_untagged_response (RESP_NONE, "FLAGS (%s)", mflags);
   /* FIXME:

@@ -35,7 +35,7 @@ imap4d IMAP4D_OPTIONS < input | remove_uidvalidity | tr -d '\r'
 * 5 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 6]] Predicted next uid
-* OK [[UNSEEN 1]] first unseen messsage
+* OK [[UNSEEN 1]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)]] Permanent flags
 1 OK [[READ-WRITE]] SELECT Completed

@@ -34,7 +34,7 @@ imap4d IMAP4D_OPTIONS < input | remove_uidvalidity | tr -d '\r'
 * 8 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 4]] first unseen messsage
+* OK [[UNSEEN 4]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)]] Permanent flags
 1 OK [[READ-WRITE]] SELECT Completed

@@ -33,7 +33,7 @@ X LOGOUT
 * 8 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 4]] first unseen messsage
+* OK [[UNSEEN 4]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)]] Permanent flags
 1 OK [[READ-WRITE]] SELECT Completed
@@ -41,7 +41,7 @@ X LOGOUT
 * 5 EXISTS
 * 0 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 1]] first unseen messsage
+* OK [[UNSEEN 1]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS ()]] No permanent flags
 3 OK [[READ-ONLY]] EXAMINE Completed

@@ -26,7 +26,7 @@ X LOGOUT
 * 8 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 4]] first unseen messsage
+* OK [[UNSEEN 4]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS ()]] No permanent flags
 1 OK [[READ-ONLY]] EXAMINE Completed

@@ -28,7 +28,7 @@ X LOGOUT
 * 8 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 4]] first unseen messsage
+* OK [[UNSEEN 4]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)]] Permanent flags
 1 OK [[READ-WRITE]] SELECT Completed

@@ -26,7 +26,7 @@ X LOGOUT
 * 8 EXISTS
 * 5 RECENT
 * OK [[UIDNEXT 9]] Predicted next uid
-* OK [[UNSEEN 4]] first unseen messsage
+* OK [[UNSEEN 4]] first unseen message
 * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
 * OK [[PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)]] Permanent flags
 1 OK [[READ-WRITE]] SELECT Completed