Set TCP defaults for max message size to align with min buffer size

[mregen]

Proposed changes

Avoid user configuration errors by setting unaligned max message size values, fix defaults.

Related Issues

• Fixes #

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Further comments

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.68%. Comparing base (663ed10) to head (9c3ed0f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2616      +/-   ##
==========================================
- Coverage   54.68%   54.68%   -0.01%     
==========================================
  Files         343      343              
  Lines       65216    65218       +2     
  Branches    13354    13354              
==========================================
+ Hits        35664    35665       +1     
- Misses      25676    25677       +1     
  Partials     3876     3876              

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