State files stored in $XDG_DATA_HOME as dot files

[jmr]

58588e7 (Support XDG Desktop Specification for config files) added support for XDG dirs, including storing files like .wget-hsts in $XDG_DATA_HOME/wget (~/.local/share/wget).

Since then, version 0.8 of the XDG base dir spec added $XDG_STATE_HOME (~/.local/state), which seems more appropriate for writable files.

$XDG_DATA_HOME is analogous to /usr/share and $XDG_STATE_HOME to /var/lib/. https://wiki.archlinux.org/title/XDG_Base_Directory

In addition, the files are stored as hidden files, whereas a name like wget-hsts or just hsts (since it's already in a wget/ subdir) would be more standard.

Would you take a patch along these lines, using the old locations if they exist, but writing to the new ones described above if they don't?

[rockdaboot]

@jmr Yeah, sounds good to me