Remove md5-utils.h include since it's not part of Camel any more.
* camel.h: Remove md5-utils.h include since it's not part of Camel
any more.
* camel-charset-map.c: Kill some warnings.
* providers/nntp/camel-nntp-grouplist.c
(camel_nntp_get_grouplist_from_file, camel_nntp_grouplist_save):
Clean up warnings about time_t casts.
* providers/smtp/camel-smtp-transport.c: Remove unused md5-utils.h
include.
* providers/pop3/camel-pop3-store.c: Undefine the "_" macro
defined by krb4's des.h when compiling with krb support.
Fix md5-utils.h include.