=act #15956 Correct exception message for invalid sys name
Merge pull request #16297 from akka/wip-15956-exc-msg-patriknw

=act #15956 Correct exception message for invalid sys name
=doc #16300 correct remote doc to right package
Merge pull request #16301 from hepin1989/release-2.3

=doc #16300 correct remote doc to right package
=act #16344 ActorPath validation now without regex, safer and faster
Merge pull request #16352 from ktoso/benching-regex

=act reimplement actor path validation without regex
+act #15163 allows to suppress certain messages from being dead-letter-ed