If the user passed `-ip` they almost certainly want to use it, even if
they also passed `-if` and `-web`.
Similarly, if the user passed `-if` they almost certainly want to use
it even if they also passed `-web`.
This allows us to use the `//` and `//=` operators.
v5.10.1 was chosen because that is the oldest version of Perl among
all currently supported releases of Ubuntu, CentOS, RHEL, Fedora, and
Debian.
Create a document whose main purpose is to describe notable changes
between released versions. Populate it with the contents of
RELEASENOTE over time and the entries from ChangeLog and
Changelog.old.
For recent releases, the full announcement text can still be found at
https://github.com/ddclient/ddclient/releases
