Parsing of IPv6 addresses not enclosed in square brackets causes a
warning to be logged.
This is too strict, since the user can not influence IPv6 addresses
received over the network, but only those in their configuration.
Remove the warning from parsing, and instead carry a boolean to warn the
user later.
To prepare for future changes, warn users if their config file currently
does not explicitly specify a default seeding policy.
Because there are now potentially multiple warnings generated that all
relate to the configuration file, group these together and adjust the
wording to be more uniform.
Lorenz Leutgeb
Lorenz Leutgeb
Adrian Duke
Fintan Halpenny