Add option for logging into a specified log file.

[jjnicola]

No description provided.

[codecov]

Codecov Report

Merging #98 into master will decrease coverage by 0.13%.
The diff coverage is 37.5%.

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
- Coverage   66.95%   66.82%   -0.14%     
==========================================
  Files           8        8              
  Lines        1513     1519       +6     
==========================================
+ Hits         1013     1015       +2     
- Misses        500      504       +4

Impacted Files	Coverage Δ
ospd/misc.py	66.22% <37.5%> (-0.39%)	⬇️

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[codecov]

Codecov Report

Merging #98 into master will decrease coverage by 0.17%.
The diff coverage is 30.76%.

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
- Coverage   66.95%   66.77%   -0.18%     
==========================================
  Files           8        8              
  Lines        1513     1517       +4     
==========================================
  Hits         1013     1013              
- Misses        500      504       +4

Impacted Files	Coverage Δ
ospd/misc.py	66.09% <30.76%> (-0.52%)	⬇️

---

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[bjoernricks]

Just a spelling mistake. I've added a suggestion.