add support for .properties configuration file

[happyinsect]

add support for .properties configuration file

[codecov-commenter]

Codecov Report

Merging #1806 (4902eb7) into master (c40a4d8) will decrease coverage by 0.00%.
The diff coverage is 83.89%.

@@            Coverage Diff             @@
##           master    #1806      +/-   ##
==========================================
- Coverage   73.46%   73.46%   -0.01%     
==========================================
  Files         494      495       +1     
  Lines       44175    44292     +117     
==========================================
+ Hits        32455    32539      +84     
- Misses       9768     9792      +24     
- Partials     1952     1961       +9     

Flag	Coverage Δ
go-1.15	73.46% <83.89%> (+0.04%)	⬆️
go-1.16	?
go-1.17	73.43% <83.89%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
encoding/gjson/gjson.go	84.01% <ø> (ø)
encoding/gproperties/gproperties.go	81.31% <81.31%> (ø)
encoding/gjson/gjson_api_encoding.go	85.18% <83.33%> (-0.24%)	⬇️
encoding/gjson/gjson_api_new_load.go	96.63% <100.00%> (+0.21%)	⬆️
os/gspath/gspath_cache.go	87.71% <0.00%> (-7.02%)	⬇️
net/gtcp/gtcp_pool.go	34.09% <0.00%> (-4.55%)	⬇️
os/gfsnotify/gfsnotify_watcher.go	81.51% <0.00%> (-2.53%)	⬇️
os/glog/glog_logger_rotate.go	65.85% <0.00%> (-1.47%)	⬇️

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[happyinsect]

user viper as the properties file decoder