* Implement `LOG4CPLUS_ASSERT_FMT()` - formats assertion
message using C-style format string.
* Implement `LOG4CPLUS_ASSERT_FORMAT()` - formats assertion
message using C++20 `<format>` header facilities.
* `log4cplus.threadPoolBlockOnFull`. When this
property is `true` (default), threads will block when
internal thread pool queue is full.
OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/log4cplus?expand=0&rev=22
