[Bug 59797] Per thread error hash grows indefinitely

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=59797

--- Comment #8 from NateC <ap...@neworld.us> ---
Created attachment 34597
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=34597&action=edit
Native only patch to release ssl errors on thread exit

I took a look at how openssl implemented error releasing in 1.1, which now does
it automatically and used that to implement similar behavior in tomcat-native.

On windows clean up is invoked on thread detach and on other platforms a thread
local with a destructor is used. Whenever ERR_clear_error or ERR_get_error is
called the thread local is set. When the thread exits the destructor will be
invoked on any thread which does not have a NULL value for the thread local.

I tested this with openssl 1.0.2. I compiled tomcat native against 1.1.0 but I
have not done any windows testing since I don't have a windows build system.

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