get Redhat tree copies working

[petersilva]

Got redhat tree copies working

• added a lot more examples/clarity around use of make
• added description of tests in the Makefile and their invocation.
• added KNOWN_REDIRECTION_BUG, so shim_tests have a means of skipping known broken tests but still running the others.
• fixed SR_DEBUG_LOGS, and then fixed the broken messages that were discovered once it was working again.
• Versioned shim library to avoid nasty binary crashes we saw on redhat 9.

Added a KNOWN_REDIRECTION_BUG switch into the shim library tests, and provided alternatives or disabled all the tests that will fail.

I'm pretty sure it was only in the login/initial shell before, and that subshells would work, but I'm just making the tests pass for now to have a baseline of working sanity tests. Consider this a work-around

Have to investigate the redirection issue separately.

Also beefed up documentation about how to build considerably... example of "make" run, and some description of the test Makefile targets.

[petersilva]

working on a cleaner version of REDIRECTION_BUG ... hang on...

[petersilva]

with the latest bug... all of the tests of re-direction are back in the test suite. The only thing needed was to ensure a sub-shell was spawned to get the re-direction to behave properly. So now, I know it's almost fully working on redhat (8 and 9)

There is one niggling test I still have to put a guard around with KNOWN_REDIRECTION_BUG, a touch that should not generate a post because the minimum interval should suppress it... works on ubuntu, but not redhat... reuires further investigation, but still what is here is a big improvement.