BIND 10 #2578: add "-q" (quiet) option to b10-loadzone

[BIND 10 Development]

#2578: add "-q" (quiet) option to b10-loadzone
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  New
           Component:  loadzone      |  Tasks
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |  loadzone-ng
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Description changed by jinmei:

Old description:

> As discussed in review of #2380.  It's probably useful if the user
> can suppress info level (or maybe even any level of) logging from
> b10-loadzone, e.g, when it's invoked from a cron.
>
> My suggestion is:
>
> - Add -q option, which disables info level logs; if specified multiple
>   times it suppress any level of logs
> - (optionally) add "-l" option, which specifies the output of log
>   messages.

New description:

 As discussed in review of #2380.  It's probably useful if the user
 can suppress info level (or maybe even any level of) logging from
 b10-loadzone, e.g, when it's invoked from a cron.

 My suggestion is:

 - Add -q option, which disables info level logs; if specified multiple
   times it suppress any level of logs
 - (optionally) add "-l" option, which specifies the output (destination)
 of log
   messages.

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Ticket URL: <http://bind10.isc.org/ticket/2578#comment:2>
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