Fixing parsing of host:port string.

[rcschrg]

This was problematic if you would use "host:port" notation, save a addr before activating, and then try to send messages with this saved addr. This makes the internal messaging check fail and it will be sent as external message, which is obviously not the point of internal messaging.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.93%. Comparing base (9fae986) to head (f7e7ff4).
Report is 2 commits behind head on development.

Additional details and impacted files

@@             Coverage Diff              @@
##           development     #137   +/-   ##
============================================
  Coverage        88.92%   88.93%           
============================================
  Files               22       22           
  Lines             2448     2449    +1     
============================================
+ Hits              2177     2178    +1     
  Misses             271      271           

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