Also now permit interactivly running tests without explicitly setting
$srcdir. This now works if we are inside ./tests and fails, as before,
when we are in a different directory.
Detected by shellcheck via CodeFactor.io
This is required to support parallel test runs.
Among others, make thise files dynamic:
* test-spool
* rsyslog.input
* rsyslog.out*.log
* tmp.in
Also:
* convert presort test statement to function
* cleanup imfile truncation test
* cleanup imfile-growing-file-id test
some cruft was left due to copy and paste error
* serialize mysql tests
changes some of the test commands to use bash functions
includes some small bug fixes to tests where bugs were
previously not seen due to different plumbing.
Bug is currently exposed only via imfile. Happens when in readMode 0 a
partial line is read and no more data is present in the file during
that iteration. One partial message is lost in this case.
Note: this just adds the test, but does not activate it. Activation
shall happen after fix is crafted.
see also https://github.com/rsyslog/rsyslog/issues/2421