Remove logback.groovy configuration (incompatible with logback 1.2.9)

[arixmkii]

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Logback dropped support for grooovy configuration since 1.2.9.

Details info could be found in news for Dec 16, 2021 http://logback.qos.ch/news.html

There are a lot of mentions of this way for configuring logs in documentation and probably also in templates. Better to remove them.

Current result - application will fail to run (including integration tests) if logback is updated to 1.2.9

[yuri1969]

Just to mention, update to Logback 1.2.9 is desirable since the recent CVE-2021-42550 affecting Logback 1.2.7 and older.

[rainboyan]

There were some discussions from Logback JIRA , grails framework nead to support backward compatibility.

Spring Boot 2.6.2 use Logback 1.2.9 now, so if Grails 5.1.2 upgrade to Spring Boot 2.6.2, it would cause some errors with logback.

[jdaugherty]

Logback still supports programmatic configuration. Grails could:

1. Implement logback's com.qos.logback.classic.spi.Configurator that looks for the old groovy file
2. Use a groovy dsl to generate the xml logback expects
3. Inform users that the first option above is left up to end-users now

[chrisbitmead]

Is it just me, or is arbitrary code execution when you have access to the server's files, a non-issue?