Support additional Apache Commons Compress compression formats on rollover: Deflate, Pack200, XY

LOG4J2-1075 included support for bzip2 compression format on file rollover, using the Apache Commons Compress library.

Gary suggested using org.apache.commons.compress.compressors.CompressorStreamFactory to create a more generic solution that lets log4j users choose from all the compression formats supported by Commons Compress.

Considerations:

• Rollover compression to .zip and .gz formats should work without error if the commons-compress jar is not in the classpath.
• XZ requires XZ for Java.
• The following documentation needs to be updated:
  • DefaultRolloverStrategy section on the Appenders manual page
  • Runtime dependencies page
  • Core index page (again for the dependency)

The additional formats are:

• Deflate
• Pack200
• XY

BZip2 is already supported through Apache Commons Compress and LOG4J2-1075.