Description of problem:
ipv4 invalid address Ex:- "192.168.1.2." is also accepted as valid ip_address. 

[04/06/12 - 17:20:08 root@APP-SERVER1 ~]# gluster volume set dstore auth.reject 192.168.1.2.
Set volume successful

Version-Release number of selected component (if applicable):
3.3qa33

How reproducible:
often

Steps to Reproduce:
1.create a distribute-replicate volume.
2.set auth.allow to "192.168.1.2." 
  
Actual results:
set volume successful

Expected results:
set volume should be unsuccessful as we have specified the invalid ip address