2.53.5 released

https://urldefense.com/v3/__https://github.com/bcpierce00/unison/releases/tag/v2.53.5__;!!IBzWLUs!WDopC8ceg9_sdiqjd5mhEiVErfzmoZbMWUlVUxO5r7T16avgmFVuSNKV_-GkLuH28S2Zk-IJMqKAqY00lg$ 

Besides bugfixes, this release changs the way repeat mode works, in that
unison will no longer try to reconnect/retry on errors.  Discussions
have shown that there are a large variety of error paths and it's very
difficult to know which ones should result in retrying and which should
not.  It's particularly difficult because it's hard to get fine-grained
error reporting from ssh in a portable, sound way.  Plus, the retry loop
didn't have exponential backoff.  One can of course wrap a unison
invocation in a 4-line shell script containing a while loop with "sleep
300".  While the astute reader might say that's equivalent, any
resulting problems will be on the wrapping person's permanent record,
not the project's :-)    It's possible there will be some retry with
backoff in circumstances where it makes sense (remote host rebooted,
network was down and is now back, ?), but it's possible that this is too
hard to do safely.

After the release, it has come to light that the gdk-pixbuf upstream has
broken the API by disabling xpm, without any deprecation warnings in
NEWS (in 2.42.11, which is labeled a micro release!)  This has caused
problems beyond unison and it's not clear how it's going to settle out,
other than it will be somewhat messy (unless gdk-pixbuf upstream
quickly, straightforwardly and firmly repents :-).  This should only
affect you if your platform has unremediated 2.42.11.  However, the
situation is not new in 2.53.5.

Please see

  https://urldefense.com/v3/__https://github.com/bcpierce00/unison/wiki/Reporting-Bugs-and-Feature-Requests__;!!IBzWLUs!WDopC8ceg9_sdiqjd5mhEiVErfzmoZbMWUlVUxO5r7T16avgmFVuSNKV_-GkLuH28S2Zk-IJMqJ-wNEngA$ 

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