I carried over an old, working Samba 3.xx configuration file to OpenBSD
6.5 and installed samba-4.8.11p0. The old configuration is for a plain
standalone server that merely exposes some public read-only shares,
there is nothing fancy in it.
Smoke-testing discovered that browsing ceased to work on some clients
while on others I could not access public shares anymore --- sure, I
expected some things to break, but certainly not browsing.
testparm(1) told me to change the file mode both of /var/samba and
/var/cache/samba from 750 (as installed with samba-4.8.11p0) to 755. Did
that, everything went back to normal.
BTW, /usr/local/share/doc/pkg-readmes/samba refers to the directory
/usr/local/share/doc/samba which the package `samba-docs' does not seem
to have.
