In the tree, libevhtp is used only for Seafile. This is the most recent
version that Haiwen lists as working.

Updated threads patch for OpenSSL 1.1.

Removed Maintainer as he is inactive.

Simplified Makefile a little bit and reorganized for consistency between
packages.

Fixed compilation with uClibc-ng.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Also switched to the proper upstream.

Signed-off-by: Rosen Penev <rosenp@gmail.com>