Add function that resets the timeout timer.

[RobertMi21]

Add function that resets the timeout timer for a connection of the HTTP server.

This is required for long lasting requests such as streaming media (MJPEG stream) or file uploads.

[codecov]

Codecov Report

Merging #88 (1f28032) into master (5003598) will increase coverage by 0.00%.
The diff coverage is 0.00%.

❗ Current head 1f28032 differs from pull request most recent head 02b8582. Consider uploading reports for the commit 02b8582 to get more accurate results

@@           Coverage Diff           @@
##           master      #88   +/-   ##
=======================================
  Coverage   53.32%   53.32%           
=======================================
  Files         192      192           
  Lines       21475    21478    +3     
=======================================
+ Hits        11451    11454    +3     
  Misses      10024    10024           

Impacted Files	Coverage Δ
src/http/server.c	68.58% <0.00%> (-0.73%)	⬇️
src/mbuf/mbuf.c	79.76% <0.00%> (+1.28%)	⬆️

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