Support for filters in PropertyConfigurator

From the docs[https://logging.apache.org/log4cxx/latest_stable/classlog4cxx_1_1PropertyConfigurator.html]:
"
The PropertyConfigurator does not handle the advanced configuration features supported by the DOMConfigurator such as support for Filters, custom ErrorHandlers, nested appenders such as the AsyncAppender, etc.
"
Did anyone added or attempted to add support for filter when using PropertyConfigurator and a properties file such as
...
log4j.appender..filter.=Custom or built in filter
log4j.appender..filter..param1=X
log4j.appender..filter..param2=Y
...

Start by reading the PropertyConfigurator documentation and the example properties syntax in the issue. Trace how appender configuration is handled, then determine what support for filter declarations and their parameters should include. Done means filters configured through the properties file are recognized and applied as expected.

Written by the indexing model from the issue text.