v3.01.99-rc3

This is a release-candidate.

As several important pull-requests have been merged, we're starting with rc series, which will be tested in the field for a few days. If no regression or blocking bug is found within ~1 week, the next v3.02.00 stable version will be released.
This rc (rc3) is expected to be the last before the release.

The following changes have been done since the previous rc:

• feat: rootListIngressKeys: look for all well-known authkeys files
• feat: add --(in|ex)clude filters to groupList and accountList
• enh: groupList: use cache to speedup calls
• enh: config: detect warnBefore/idleTimeout misconfiguration (#125)
• fix: scripts: (( )) returns 1 if evaluated to zero, hence failing under set -e
• fix: config: be more permissive for documentationURL regex
• fix: TOCTTOU fixes in ttyrec rotation script and lingering sessions reaper
• fix: confusing error messages in groupDelServer
• chore: tests: also update totalerrors while tests are running