Scenario:
- Running 11.2
- Have "DEFAULT_VERSIONS+=ssl=base" in /etc/make.conf
- Rebuilding multimedia/librtmp
- Later on, rebuilding math/libqalculate

Result:
- Build of librtmp-2.4.20151223_1 succeeds
- librtmp contains undefined symbols which lead to linker errors in programs using it
- Build of libqalculate-2.6.1_1 fails with

/usr/local/lib/librtmp.so.1: undefined reference to `DH_get0_pqg'
/usr/local/lib/librtmp.so.1: undefined reference to `DH_set_length'
/usr/local/lib/librtmp.so.1: undefined reference to `DH_get0_key'
/usr/local/lib/librtmp.so.1: undefined reference to `HMAC_CTX_free'
/usr/local/lib/librtmp.so.1: undefined reference to `DH_set0_key'
/usr/local/lib/librtmp.so.1: undefined reference to `HMAC_CTX_new'

Fix:
- The openssl-1.1.1 patch must only be applied if a corresponding openssl version is indeed installed