[#654] Fix race which could lead to some concurrent side-effects like raise a ConcurrentModificationException when using the nio transport
[#712] Fix parsing dates in the past bug in CookieDecoder
Fix overly-strong type casts
Move private methods only used from inner classes to the inner classes
Remove pointless bitwise expressions
Simplify SingletonHolder by using interface instead of static class
Add missing @Override annotation
Fix utility classes - missing final modifiers etc
Remove concatenation with empty string
Replace dynamic regular expressions with precompiled Patterns or new StringUtil.split()
Enum should not have a non-final value
Remove redundant no-arg constructors
Upgrade netty-build to 11
Prefer isEmpty() over size() == 0 or length() == 0
Remove unnecessarily qualified static access
Remove unnecessary null check before equals()
Fix a regression in HttpMessageDecoder due to a mistake during yak shaving
Remove recundant type casting
Add missing final modifiers
Remove unnecessary this, parenthesis, and semicolons