Make log rotation optional

[vithyze]

This disables the log rotation feature, so people can use external utilities like logrotate.

[codecov[bot]]

Codecov Report

Merging #249 (fa013f6) into master (8e2adf8) will decrease coverage by 0.05%. The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #249      +/-   ##
==========================================
- Coverage   86.41%   86.36%   -0.05%     
==========================================
  Files          46       46              
  Lines        3776     3777       +1     
==========================================
- Hits         3263     3262       -1     
- Misses        513      515       +2     

Impacted Files	Coverage Δ
supysonic/config.py	95.74% <ø> (ø)
supysonic/daemon/__init__.py	38.23% <0.00%> (ø)
supysonic/web.py	100.00% <100.00%> (ø)
supysonic/covers.py	80.39% <0.00%> (-3.93%)	:arrow_down:

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[spl0k]

Actually merged with eac6bdf1a36136a13890b5d8038d8d022ac7b96d