[xmlsec] Thread safety?

[Jesse Pelton]

I'm considering using XMLSec in a multi-threaded environment. Is libxmlsec
thread-safe? I gather from the archives and bug database that libxslt is not
thread-safe, so libxmlsec would need to guard calls into libxslt. That's
hardly an ideal situation, and I'd be surprised if you've done it.

Assuming that libxmlsec is not presently thread-safe, are the issues
entirely in the libraries it uses, or are there issues in libxmlsec itself?