use sigmasks to block SIGINT, SIGTERM, SIGUSR1 from all other threads
also initiate shutdown by calling sighandler directly,
in case this misses anything and that is still unreliable
(discovered by `--exit=idx` being noop once in a blue moon)
* when bind-mounting, resolve any symlinks ($v/) and read target inode;
for example merged /bin and /usr/bin
* add failsafe in case this test should break in new exciting ways;
inspect `mount` for any instances of the jailed path
(not /proc/mounts since that has funny space encoding)
* unmount in a while-loop because xargs freaks out if one of them fail
* and systemd doesn't give us a /dev/stderr to write to anyways
not even the deprecationwarning that got silently generated burning
20~30% of all CPU-time without actually displaying it anywhere, nice
python 3.12.0 is now only 5% slower than 3.11.6
also fixes some other, less-performance-fatal deprecations
* mention cloudflare-specific nginx config
versus.md:
* seafile has a size limit on zip downloads
* seafile and nextcloud are slow at uploading many small files
u2c: improve error message in funky environments
these are all the protocols that are currently supported by wget,
so this has no practical effect aside from making sure we won't
suddenly get file:// support or something (which would be bad)
mainly motivated by u2cli's folder syncing in turbo mode
which would un-turbo on most dupes due to wrong lastmod
disabled by default for regular http listings
(to avoid confusion in most regular usecases),
enable per-request with urlparam lt
enabled by default for single-level webdav listings
(because rclone hits the same issue as u2cli),
can be disabled with arg --dav-rt or volflag davrt
impossible to enable for recursive webdav listings