BIND 10 #558: Disable log4cxx dependency in logging API

[BIND 10 Development]

#558: Disable log4cxx dependency in logging API
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                 Reporter:  stephen  |                Owner:  jinmei
                     Type:  defect   |               Status:  reviewing
                 Priority:  major    |            Milestone:  R-Team-
                Component:  logging  |  Sprint-20110222
                 Keywords:           |           Resolution:
Estimated Number of Hours:  2.0      |            Sensitive:  0
                Billable?:  1        |  Add Hours to Ticket:  0
                Internal?:  0        |          Total Hours:  0
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Comment (by jinmei):

 I'm looking into the changes, but a couple of trivial nits first:
  - in the new change you reverted parentheses around return, against
    the style guideline, e.g.
 {{{
 -    return (isc::strutil::trim(current_time));
 +    return isc::strutil::trim(current_time);
 }}}
    Please fix them.
  - there are some redundant white spaces in blank lines, e.g.
 {{{
 +             "\n";
 +
 +        // Declare the message symbols themselves.
 }}}
   git diff with colors (or colours:-) highlights these.  I suggest you
   check the result of git diff and fix such trivial issues.

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Ticket URL: <http://bind10.isc.org/ticket/558#comment:15>
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