No longer mention OPENSSL_EC_BIN_PT_COMP being required to allow for

No longer mention OPENSSL_EC_BIN_PT_COMP being required to allow for
`compressed' EC point representation.

First, as researched by djb, quoting from http://cr.yp.to/ecdh/patents.html :
``It should, in any case, be obvious to the reader that a patent cannot
  cover compression mechanisms published seven years before the patent
  was filed.''

Second, that define was actually removed from the code in in OpenSSL 1.0.0.