bug#19821: Openssl 1.0.2 and cmake

[Andreas Enge]

Currently, libwebsockets fails to build because its dependency openssl
is not found by cmake any more since we switched to 1.0.2. There is a patch
in the cmake git at
   
http://www.cmake.org/gitweb?p=cmake.git;a=blobdiff;f=Modules/FindOpenSSL.cmake;h=6b4f9853c01f64b94bfec3ff51da8789af63a07e;hp=340b41740e10a44af287a3a1c8bc3c52f65c7e5f;hb=c5d9a8283cfac15b4a5a07f18d5eb10c1f388505;hpb=57622bd19d3fd013038d34f497b106a7e2bfd26d
which we might wish to apply.

We may also consider switching to a newer cmake version, 3.2.0 should
include the fix once it is out.

Andreas