Merge of r4868, r4869: SSL minor fixes.

Merge of r4868, r4869: SSL minor fixes.

*) SSL: fixed compression workaround to remove all methods.

   Previous code used sk_SSL_COMP_delete(ssl_comp_methods, i) while iterating
   stack from 0 to n, resulting in removal of only even compression methods.

   In real life this change is a nop, as there is only one compression method
   which is enabled by default in OpenSSL.

*) SSL: added version checks for ssl compression workaround.

   The SSL_COMP_get_compression_methods() is only available as an API
   function in OpenSSL 0.9.8+, require it explicitly to unbreak build
   with OpenSSL 0.9.7.