While this word may be less familiar to some users, it avoids the
connotation that version 2 is better than version 1, which is wrong
when the two variants were conflicting.
Accept arbitrarily encoded repository filepaths etc when reading git config
output. This fixes support for remotes with unusual characters in their
names.
For example, a remote with a url of /tmp/çüş was previously
skipped, because the filename wasn't encoded right so it didn't think it
was available. And when setting the annex-uuid of a remote named "çüş",
it used to add it under a mis-encoded form of the remote's name. Both these
cases now work ok in my testing.
Not including such remotes turned out to have other consequences,
including annex-truselevel git config being ignored. Instead, add guards
before each operation that might try to operate on such a repo.
SampleMVar won't work; between getting the current value and changing
it, another thread could made a change, which would get lost.
TMVar works well; this update situation is handled by atomic transactions.
Prelude.undefined error message was introduced by
bb4f31a0ee.
It seems best to filter out local repositories that cannot be accessed
from the list of remotes, rather than keeping them in and making every
thing that uses the list have to deal with remotes that may have an unknown
location.
Besides fixing the error message, this also makes unavailable local
remotes' names not be shown in various messages, including in git annex
status output.
Also, move --to an unavailable local repository now avoids some ugly
errors like "changeWorkingDirectory: does not exist".
