• (ms) Applied patch by Peter Rabbitson, which fixes the caller()
  level when calling get_logger() on a subclass of Log4perl.
  
• (ms) Added documentation on is_xxx() methods and clarified that
  it doesn't necessarily mean that a message gets logged if
  they're returning true (requested by Conway Allen via
  [rt.cpan.org #39085].
  
• (ms) Applied patch by Lee Johnson to appender_by_name() to allow
  for undefined appender names without issuing a warning,
  which was occurring with Catalyst::Log4perl.
  
• (ms) Added docs on numerical levels and level strings in
  Log::Log4perl::Level.
  
• (ms) Applied patch by Anthony Foiani for support of literal
  text in DateFormat format strings.