long standing buglet in mailfront plugin

In plugin-check-fqdn.c, if you use RELAYCLIENT to route mail from some IPs 
for further scrutiny, it fails the FQDN check if the RELAYCLIENT string 
doesn't have a dot in it, which it usually doesn't.

The fix is simple, at line 88 add a line like this:

   if(session_getenv("RELAYCLIENT")) return 0; /* it's under control */

I noticed this when I moved from 2.12 to 2.13 and forgot to copy that 
patch to the new version.

Regards,
John Levine, [email protected], Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly