"courier-gnutls" option/toggle that allows using GNU TLS instead of
defaulting to OpenSSL.
Bump the PKGREVISION of couriertcpd, courier-imap, and courier-mta to 1.
include:
+ Add a new option "gnutls" to support using GNUTLS instead of OpenSSL.
+ Add full DESTDIR support.
+ Fix CONFLICT with courier-imap -- we conflict with courier-imap<4.1.1,
not 4.11.