[arch-dev-public] OpenSSL 1.0 - take 3

Since moving on to OpenSSL 1.1 and introducing a compatibility package openssl-1.0 (which isn't compatible), we still have FS#53836 [1] open. I want to propose another openssl-1.0 rebuild that restores binary compatibility with non-free software and Debian Jessie (jessie-backports) by packaging OpenSSL 1.0.2 with 1.0.0 soname and 1.0.0 versioned symbols. At this moment I don't care about an openssl-1.0.2 package that ships libssl.so.1.0.2 like Debian does in unstable/testing at the moment, when non-free software catches up with that we can introduce such a package later. Any objections? If not, let's make a new rebuild list and fix this.