Disabling SSL compression is dependent on OpenSSL version 0.9.8

[carter-thaxton]

In version 0.4.7, a patch was submitted to disable SSL compression to reduce memory use.
However, that fix uses the SSL_COMP_get_compression_methods(), which was added only in OpenSSL version 0.9.8

Unfortunately, several systems, notably Mac OS X 10.5.8 (Leopard), ship with OpenSSL 0.9.7.
I'd prefer to compile on all systems, and be optimal when we can.