amend to 62b1712d22 (PR #2387, backend-related option `logtype`);
testSampleRegexsZZZ-GENERIC-EXAMPLE covering now negative case also (other daemon in prefix line)
- `datepattern = {^LN-BEG}` - only line-begin anchored default patterns
(matches date only at begin of line, or with max distance up to 2 non-alphanumeric characters from line-begin);
- `datepattern = {*WD-BEG}` - only word-begin anchored default patterns;
- `datepattern = ^prefix{DATE}suffix` - exact specified default patterns (using prefix and suffix);
common filter configs gets a more precise, line-begin anchored (datepattern = {^LN-BEG}) resp. custom anchoring default date-patterns;
sebres