cleanup security/samhain

[lifanov]

Summary

o get rid of redundant --localstatedir
o get rid of deprecated ${PORTSDIR} in depends lines
o reduce number of pre/post targets
o get rid of root check for MKCHECK option:
   building as non-root doesn't affect final package
o obey LOCALBASE in several new places

Test Plan

poudriere testport - OK

[mat]

Before you commit this, you'll repeat 20 times:

LOCALBASE is where my dependencies are installer, PREFIX is where I install myself.

security/samhain/Makefile

164

There is a good chance that this myconffile variable can be set directly with some --with-myconffile=${FOO} or something.

Also, this line does *not* belong in the extract phase, but in the patch one.

[lifanov]

address mat's feedback

Unfortunately, --with-config-file is used both at install and at runtime
and we would like to install these with .sample suffix.

[mat]

It still should be in the patch phase.