openssl -> openssl_1_0_1

This renames the current openssl to openssl_1_0_1 and defaults
openssl back to openssl_1_0_1 essentially changing nothing currently,
but allowing people to explicitly select openssl_1_0_1 for some software
which needs ABI compatibility to a specific libssl implementation like
binaries (spotify amongst others) and at the same time overriding
openssl to another implementation like libressl.