Build fails with libressl 2.7.x

[dropwhile]

netatalk currently fails to build with libressl > 2.7.0

I believe a change is required to etc/uams/openssl_compat.h

Currently:

#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER) 

I think this is appropriate:

#if OPENSSL_VERSION_NUMBER < 0x10100000L || (defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x2070000fL)

Once changed, build is successful for me.

ref: my freebsd-ports bug report