[Bugs] [Bug 1169707] New: `gluster peer probe hostname` fails when hostname contains '_'

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1169707

            Bug ID: 1169707
           Summary: `gluster peer probe hostname` fails when hostname
                    contains '_'
           Product: GlusterFS
           Version: 3.4.2
         Component: glusterd
          Severity: medium
          Assignee: bugs at gluster.org
          Reporter: junli.li at cs2c.com.cn
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Description of problem:
`gluster peer probe hostname` fails when hostname contains '_'

Version-Release number of selected component (if applicable):
3.4.2-1

How reproducible:
always

Steps to Reproduce:
1.set a host'name to "n_***", such as "n_node";
2.on another node, execute `gluster peer probe n_node`
3.

Actual results:
2. 
n_node is an invalid address
Usage: peer probe <HOSTNAME>


Expected results:
2.
peer probe: success


Additional info:

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