Add multiple content length error

[alandefreitas]

fix #2468

[alandefreitas]

@ned14

[cppalliance-bot]

Timeline tracing charts: https://2476.beast.tracing.cppalliance.org/index.html

[codecov[bot]]

Codecov Report

Merging #2476 (b74fc60) into develop (00293a6) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2476      +/-   ##
===========================================
+ Coverage    94.72%   94.75%   +0.02%     
===========================================
  Files          152      152              
  Lines        11868    11871       +3     
===========================================
+ Hits         11242    11248       +6     
+ Misses         626      623       -3     

Impacted Files	Coverage Δ
include/boost/beast/http/impl/basic_parser.ipp	94.61% <100.00%> (+0.02%)	:arrow_up:
include/boost/beast/http/impl/error.ipp	95.23% <100.00%> (+0.11%)	:arrow_up:
include/boost/beast/websocket/impl/ping.hpp	94.73% <0.00%> (-0.88%)	:arrow_down:
include/boost/beast/websocket/impl/read.hpp	97.16% <0.00%> (+0.66%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 00293a6...b74fc60. Read the comment docs.

[vinniefalco]

Seems ok. What does @ned14 think?

[klemens-morgenstern]

Can this be merged?

[klemens-morgenstern]

No objections, so i'll merge.