Sync with 2.9.3

* tag 'v2.9.3':
Git 2.9.3

diff --combined Documentation/git.txt
index f4dfc9d42c2dec433c2b996d0b198a23cd0334af,923aa49db7f67ca6cb4510852f941654c55c59b2..bd659c44711b96ab011d7b6d52b71b0f2c486bd2
--- 1/Documentation/git.txt
--- 2/Documentation/git.txt
+++ b/Documentation/git.txt
@@@ -43,9 -43,10 +43,10 @@@ unreleased) version of Git, that is ava
  branch of the `git.git` repository.
  Documentation for older releases are available here:
  
- * link:v2.9.2/git.html[documentation for release 2.9.2]
+ * link:v2.9.3/git.html[documentation for release 2.9.3]
  
  * release notes for
+   link:RelNotes/2.9.3.txt[2.9.3],
    link:RelNotes/2.9.2.txt[2.9.2],
    link:RelNotes/2.9.1.txt[2.9.1],
    link:RelNotes/2.9.0.txt[2.9].
@@@ -1085,14 -1086,6 +1086,14 @@@ of clones and fetches
        cloning of shallow repositories.
        See `GIT_TRACE` for available trace output options.
  
 +`GIT_TRACE_CURL`::
 +      Enables a curl full trace dump of all incoming and outgoing data,
 +      including descriptive information, of the git transport protocol.
 +      This is similar to doing curl `--trace-ascii` on the command line.
 +      This option overrides setting the `GIT_CURL_VERBOSE` environment
 +      variable.
 +      See `GIT_TRACE` for available trace output options.
 +
  `GIT_LITERAL_PATHSPECS`::
        Setting this variable to `1` will cause Git to treat all
        pathspecs literally, rather than as glob patterns. For example,