Added null terminator line ending mode

[Kahath]

Currently there are only 4 options for target line ending mode, CRLF|LF|CR|None.
This pull request adds null terminator line ending mode to target "lineEnding" attribute in configuration.
https://github.com/NLog/NLog/wiki/Network-target

[welcome]

Thanks for opening this pull request!
We will try to review this soon! Please note that pull requests with unit tests are earlier accepted 👼

[codecov-io]

Codecov Report

Merging #3453 into master will increase coverage by <1%.
The diff coverage is 50%.

@@           Coverage Diff           @@
##           master   #3453    +/-   ##
=======================================
+ Coverage      80%     80%   +<1%     
=======================================
  Files         359     359            
  Lines       28634   28636     +2     
  Branches     3817    3818     +1     
=======================================
+ Hits        22916   22919     +3     
  Misses       4620    4620            
+ Partials     1098    1097     -1

[304NotModified]

THanks for the PR!

What's the exact use case for this line ending?

[Kahath]

Graylog GELF over TCP has option for null terminator line ending mode. It's called null frame delimiter.

[304NotModified]

thanks! I changed to commit to master, so I could include it in NLog 4.6.5 :)

[Kahath]

Nice. Thanks :)

[welcome]

Hooray your first pull request is merged! Thanks for the contribution! Looking for more? 👼 Please check the up-for-grabs issues - thanks!

[304NotModified]

NLog 4.6.5 has been released! https://www.nuget.org/packages/NLog/4.6.5 :)