Commit e91e48161235272ff485ff32bd048c53af731f43 moved ftp_ccc in under
the FTP featureflag in the UserDefined struct, but vtls callsites were
still using it unprotected.
Closes#3912
Fixes: https://curl.haxx.se/dev/log.cgi?id=20190520044705-29865
Reviewed-by: Daniel Stenberg, Marcel Raad
They serve very little purpose and mostly just add noise. Most of them
have been around for a very long time. I read them all before removing
or rephrasing them.
Ref: #3876Closes#3883
As soon as a TLS backend gets ALPN conformation about the specific HTTP
version it can now set the multiplex situation for the "bundle" and
trigger moving potentially queued up transfers to the CONNECT state.
