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Git Release Notes

Fixes since v1.8.1.4

 * Given a string with a multi-byte character that begins with '-' on
   the command line where an option is expected, the option parser
   used just one byte of the unknown letter when reporting an error.

 * In v1.8.1, the attribute parser was tightened too restrictive to
   error out upon seeing an entry that begins with an ! (exclamation),
   which may confuse users to expect a "negative match", which does
   not exist.  This has been demoted to a warning; such an entry is
   still ignored.

 * "git apply --summary" has been taught to make sure the similarity
   value shown in its output is sensible, even when the input had a
   bogus value.

 * "git clean" showed what it was going to do, but sometimes ended
   up finding that it was not allowed to do so, which resulted in a
   confusing output (e.g. after saying that it will remove an
   untracked directory, it found an embedded git repository there
   which it is not allowed to remove).  It now performs the actions
   and then reports the outcome more faithfully.

 * "git clone" used to allow --bare and --separate-git-dir=$there
   options at the same time, which was nonsensical.

 * "git cvsimport" mishandled timestamps at DST boundary.

 * We used to have an arbitrary 32 limit for combined diff input,
   resulting in incorrect number of leading colons shown when showing
   the "--raw --cc" output.

 * The smart HTTP clients forgot to verify the content-type that comes
   back from the server side to make sure that the request is being
   handled properly.

 * "git help remote-helpers" failed to find the documentation.

 * "gitweb" pages served over HTTPS, when configured to show picon or
   gravatar, referred to these external resources to be fetched via
   HTTP, resulting in mixed contents warning in browsers.

Also contains various documentation fixes.