Refactor duplicate code in crypt module.

[Cizzle]

Moves code from OnUserMsg, OnUserNotice and OnUserAction to one function.

[codecov]

Codecov Report

Merging #1386 into master will increase coverage by 0.09%.
The diff coverage is 53.57%.

@@            Coverage Diff             @@
##           master    #1386      +/-   ##
==========================================
+ Coverage    40.5%   40.59%   +0.09%     
==========================================
  Files         109      109              
  Lines       21313    21274      -39     
==========================================
+ Hits         8633     8637       +4     
+ Misses      12680    12637      -43

Impacted Files	Coverage Δ
modules/crypt.cpp	56.58% <53.57%> (+8.1%)	✅
src/FileUtils.cpp	49.85% <0%> (+0.57%)	✅

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[DarthGandalf]

Thanks.
This is not what I meant - with CMessage API you wouldn't need so many parameters to FilterOutgoing function, but it's still much better than the duplicated code before.