security/zeek: Unbreak build with libressl
Apply upstream fixes for building with libressl:
https://github.com/zeek/zeek/pull/5578
Which includes:
https://github.com/zeek/zeek/commit/8e05b01 https://github.com/zeek/zeek/commit/f38fa4d
Obtained from: Kevin Harrington
Reported by: Kevin Harrington