Improved search for network addresses within a given string #355
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Fixes #353
Also checks various suffixes of the given string to see if they can be interpreted as a network address. Starts from the whole string, then checks shorter and shorter suffixes.
This comes to identify network addresses in command-line args like
-server-addr=my_server:5000
orserver-addr:my_server:5000
.Since we now find more suspects, a validation of the port number/name was also added, to rule-out strings that are clearly not network addresses.