Description of problem:
When setting up DNS, trying to setup multiple servers failed.  Assuming dns
servers are 1.1.1.1 and 1.1.1.2, I tried both of the following combinations:

1.1.1.1,1.1.1.2 and 1.1.1.1, 1.1.1.2.  In both cases, after applying the
changes, /etc/resolv.conf was empty.  When trying with just one, the changes
were applied correctly

Version-Release number of selected component (if applicable):
5.4-2.0.99.8.2.el5rhev

How reproducible:
Always

Steps to Reproduce:
1. PXE node onto fresh server
2. go into network setup
3. Choose static IP
4. Setup IP, Mask, Gateway
5. Choose DNS setup
6. enter DNS servers using formats above
7. Commit changes

Actual results:
/etc/resolv.conf is empty.  Cannot ping by name

Expected results:
/etc/resolv.conf contains nameserver entries for both dns servers mentioned.  
Ping by name succeeds

Additional info:
The input method for DNS servers should follow the same method used for NTP
servers.  It should take each on a separate line and force exit after 2 are
entered.