Description of problem:
The message at the top of the "Manual TCP/IP Configuration" dialog in the 
Anaconda loader states that both "dotted-quad netmask or the CIDR-style prefix 
are acceptable". Never the less, when a network mask is specified in the field, 
when leaving it an "Invalid Prefix" error message appears, stating that "prefix 
must be between 1 and 32 for IPv4 networks". The network mask is used without 
problems though.

Version-Release number of selected component (if applicable):
11.2.0.66

How reproducible:
Always

Steps to Reproduce:
1. Get to the "Manual TCP/IP Configuration" dialog.
2. Enter network mask (not prefix) in the mask/prefix field
3. Leave the field by pressing tab.
  
Actual results:
The network mask is used without problems but the error message states that it 
is not a valid input.

Expected results:
Both network prefix and mask should be valid input.

Additional info:
Traced the problem to line 96 in loader2/net.c

When a network mask is specified with the kernel command line 
parameter "netmask" it is used as a default value in the "Manual TCP/IP 
Configuartion" dialog. When a prefix/CIDR is specified it is not used as a 
default value. This is expected but inconveniet behaviour.