Why doesn't libevent include built-in https support?

I'm trying to find a good library to deal with large number of concurrent connections and I came across Libevent and Libev. But neither o开发者_JS百科f them has built-in ssl/https support. I'm wondering if I'm missing something here on how these libraries should be used because ssl/https is so commonly used yet it's not in these two popular tools.

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I believe libevent2 has support for SSL.

http://levent.git.sourceforge.net/git/gitweb.cgi?p=levent/levent;a=blob;f=ChangeLog;hb=fe008ed656766266b93cdf2083f5b8bc50e6aad3