Since we're using CURLE_FTP_WEIRD_SERVER_REPLY in imap, pop3 and smtp as
more of a generic "failed to parse" introduce an alias without FTP in
the name.
Closes https://github.com/curl/curl/pull/975
consolidated them into one file called config-vms.h. The curlmsg.h and .sdl
files are generated from the curlmsg.msg file and, thus, shouldn't be in the
dist.