Description of problem:
From tech-list:
"btw, the root cause is the webform on rhn.redhat.com that is used for  
> setting up proxies.  it originally didn't let me put in a '-' in the  
> hostname, even though '-' is a perfectly valid character to put in  
> hostnames.   i would have liked to put in tur-cache1, with the port  
> 8080.  since it didn't let me do that i ended up (in frustration) just  
> putting in turcache1 and missed out the port.  then i just hand edited  
> /etc/rhn/rhn.conf with the correct info.  however that was ages ago, and  
> after this upgrade it looks like what i had originally entered in the  
> webform got put in rhn.conf again, and i forgot (or didn't think it was  
> necessary) to modify rhn.conf again.  i sent an email to somewhere  
> (linked off rhn.redhat.com 'Contact Us' or something like that), but  
> didn't get a reply. "
>
> Anyone know if this is still an issue with setting up RHN proxy? More  
> importantly where do the "Contact us" emails go in this case as a  
> general follow up to the clients concerns and lack of reply?


I checked it and it really do not allow such scenarion.
The problem is in 
web/modules/rhn/RHN/Form/Require.pm
in function fqdn_and_port, which has this regexp:
  if ($text =~ /([^a-zA-z0-9\.-:])/) {
The problem is in  ".-:", correct should be:
  if ($text =~ /([^a-zA-z0-9\.:-])/) {