mention --remove in --help output

amends d9a983a.

src/main.c

@@ -77,7 +77,8 @@ PACKAGE " " VERSION " - mailbox synchronizer\n"
 "  -N, --renew		propagate previously not propagated new messages\n"
 "  -L, --pull		propagate from master to slave\n"
 "  -H, --push		propagate from slave to master\n"
-"  -C, --create		create mailboxes if nonexistent\n"
+"  -C, --create		propagate creations of mailboxes\n"
+"  -R, --remove		propagate deletions of mailboxes\n"
 "  -X, --expunge		expunge	deleted messages\n"
 "  -c, --config CONFIG	read an alternate config file (default: ~/." EXE "rc)\n"
 "  -D, --debug		debugging modes (see manual)\n"
@@ -88,7 +89,8 @@ PACKAGE " " VERSION " - mailbox synchronizer\n"
 "\nIf neither --pull nor --push are specified, both are active.\n"
 "If neither --new, --delete, --flags nor --renew are specified, all are active.\n"
 "Direction and operation can be concatenated like --pull-new, etc.\n"
-"--create and --expunge can be suffixed with -master/-slave. Read the man page.\n"
+"--create, --remove, and --expunge can be suffixed with -master/-slave.\n"
+"See the man page for details.\n"
 "\nSupported mailbox formats are: IMAP4rev1, Maildir\n"
 "\nCompile time options:\n"
 #ifdef HAVE_LIBSSL