SSL: Added CyaSSL to SSL abstraction layer

CyaSSL (available from git@github.com:cyassl/cyassl.git) has been
added to the SSL abstraction layer.

To test:
1) git CyaSSL sources
2) autoreconf -i
3) ./configure --disable-static
4) make
5) sudo make install
6) autoreconf -i
7) git curl sources (and this patch)
8) ./configure --disable-shared --with-cyassl --without-ssl --enable-debug
9) make
10) normal testing

Please send questions or comments to todd@yassl.com .