Many tests skip tests for various reasons but not in a consistent way and
don't always clean up, so add that and switch the tests that do that over.
OpenBSD-Regress-ID: 72d2ec90a3ee8849486956a808811734281af735
Allow to run ssh regression tests as root. If the user
is already root, the test should not expect that SUDO is set. If ssh needs
another user, use sudo or doas to switch from root if necessary. OK dtucker@
Upstream-Regress-ID: b464e55185ac4303529e3e6927db41683aaeace2
Some tests have strict requirements on the filesystem permissions
for certain files and directories. This adds a regress/check-perm
tool that copies the relevant logic from sshd to exactly test
the paths in question. This lets us skip tests when the local
filesystem doesn't conform to our expectations rather than
continuing and failing the test run.
ok dtucker@