Max receive buffer size via SettingEngine

[enobufs]

Relates to pion/sctp#218

Description

Current pion/sctp's receive buffer size is hardcoded as 1 MiB. This change makes the value configurable from the SettingEngine.

Reference issue

See pion/sctp#218 for more details about the context of this pull-request.

[codecov]

Codecov Report

Merging #2192 (9f990db) into master (9f990db) will not change coverage.
The diff coverage is n/a.

❗ Current head 9f990db differs from pull request most recent head 1ef4789. Consider uploading reports for the commit 1ef4789 to get more accurate results

@@           Coverage Diff           @@
##           master    #2192   +/-   ##
=======================================
  Coverage   76.84%   76.84%           
=======================================
  Files          87       87           
  Lines        8990     8990           
=======================================
  Hits         6908     6908           
  Misses       1656     1656           
  Partials      426      426           

Flag	Coverage Δ
go	78.62% <0.00%> (ø)
wasm	69.94% <0.00%> (ø)

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