Follow ups to GhostCat - AJP connector

[cbeach47]

#1533

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Description of change

2020.1.0 included tomcat 8.5.51 , and subsequently broke the AJP connector.

This PR fixes the AJP connector with the following:
mandatory-config.properties :
ajp.secret.required - it should be set to false for now. Default is true since it's more secure
ajp.address - Default is 127.0.0.1

Another configuration, ajp.secret , was added in, but should be considered a beta feature. The default value ignore of ajp.secret will do just that.

I am waiting to test ajp.secret until httpd 2.4.42+ is released into the repos - currently looks like it doesn't have full approval of the community. It would be appreciated if folks in the community can confirm ajp.secret works with a different web server, and then ajp.secret can move out of beta.

Support for ajp secret in httpd 2.4.42 : https://www.apachelounge.com/viewtopic.php?t=8448
Issues with 2.4.42 / 2.4.43 : https://www.apachelounge.com/viewtopic.php?t=8441

[edalex-ian]

I'm okay with this mostly - hence approve. But not sure what you're doing with the version there.

Also, how do you plan to capture the doco for this? I note that most of these are also missing from mandatory and optional properties, so I guess it's just something over on openequella.github.io. 🤔

[cbeach47]

Thx @edalex-ian - The AlphaC was not supposed to be committed, so I switched it back to Alpha. For the configs, due to the minutes in https://github.com/openequella/openEQUELLA/wiki/CDM-2019-12 , I've separated out the documented configs and added the configs from this PR in openequella/openequella.github.io#65 . Once the builds pass, I'll merge this in.

[edalex-ian]

Good stuff! Merge on. 👍