You are now in the directory for the port "security/nessus-libnasl" (package name "nessus-libnasl-0.99.1").
This is the one-line description for this port:
Nessus Attack Scripting Language
Please read the file "pkg/DESCR" for a longer description.
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This port requires package(s) "nessus-libraries-0.99.1" to build.
This port requires package(s) "nessus-libraries-0.99.1" to run.