be5ca825a38bc71c3a79ef35335e9c2e597ad225 doc: update NetBSD build instructions for 8.0 (fanquake)
Pull request description:
Updates the NetBSD build documentation for 8.0.
Use Python37 and add pkg-config.
Switches to using our `contrib/install_db4.sh` script for installing bdb.
Tree-SHA512: c0ac1a89349a752d9d4d87e2d134fd402e9beaac84e471ec9a0b507ebc5e762e973c8d2821db3824dea82841e38c39b0bb0a0d97f7e58318f2b15e93e81bf654