Second half of the fifth batch for 1.8.0

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/1.8.0.txt

@@ -51,12 +51,20 @@ UI, Workflows & Features
  * "git grep" learned to use a non-standard pattern type by default if
    a configuration variable tells it to.
 
+ * "git merge-base" learned "--is-ancestor A B" option to tell if A is
+   an ancestor of B.  The result is indicated by its exit status code.
+
+
 Foreign Interface
 
  * "git svn" has been updated to work with SVN 1.7.
 
 Performance, Internal Implementation, etc. (please report possible regressions)
 
+ * Git ships with a fall-back regexp implementation for platforms with
+   buggy regexp library, but it was easy for people to keep using their
+   platform regexp.  A new test has been added to check this.
+
  * The "check-docs" build target has been updated and greatly
    simplified.
 
@@ -64,13 +72,14 @@ Performance, Internal Implementation, etc. (please report possible regressions)
    for materials meant to be examples that are better typeset in
    monospace.
 
- * Compatibility wrapper to learn the maximum number of file
-   descriptors we can open around sysconf(_SC_OPEN_MAX) and
-   getrlimit(RLIMIT_NO_FILE) has been introduced for portability.
-
  * Compatibility wrapper around some mkdir(2) implementations that
    reject parameter with trailing slash has been introduced.
 
+ * Many internal uses of "git merge-base" equivalent were only to see
+   if one commit fast-forwards to the other, which did not need the
+   full set of merge bases to be computed. They have been updated to
+   use less expensive checks.
+
  * The heuristics to detect and silently convert latin1 to utf8 when
    we were told to use utf-8 in the log message has been transplanted
    from "mailinfo" to "commit" and "commit-tree".
@@ -88,6 +97,10 @@ Unless otherwise noted, all the fixes since v1.7.12 in the
 maintenance track are contained in this release (see release notes
 to them for details).
 
+ * "git show --format='%ci'" did not give timestamp correctly for
+   commits created without human readable name on "committer" line.
+   (merge e27ddb6 jc/maint-ident-missing-human-name later to maint).
+
  * "git cherry-pick A C B" used to replay changes in A and then B and
    then C if these three commits had committer timestamps in that
    order, which is not what the user who said "A C B" naturally
@@ -143,17 +156,6 @@ to them for details).
    this problem.
    (merge 6a2abdc jc/apply-binary-p0 later to maint).
 
- * The exit status code from "git config" was way overspecified while
-   being incorrect.  The implementation has been updated to give the
-   documented status for a case that was documented, and introduce a
-   new code for "all other errors".
-   (merge 9409c7a jc/maint-config-exit-status later to maint).
-
- * "git foo" errored out with "Not a directory" when the user had a
-   non-directory on $PATH, and worse yet it masked an alias "foo" from
-   running.  (merge a785508 jc/maint-sane-execvp-notdir later to
-   maint).
-
  * The interactive prompt "git send-email" gives was error prone. It
    asked "What e-mail address do you want to use?" with the address it
    guessed (correctly) the user would want to use in its prompt,
@@ -161,33 +163,3 @@ to them for details).
    please use 'y' as the e-mail address instead", which is most
    certainly not what the user meant.
    (merge 51bbccf jc/send-email-reconfirm later to maint).
-
- * "git stash apply/pop" did not trigger "rerere" upon conflicts
-   unlike other mergy operations.
-   (merge 743bf6d ph/stash-rerere later to maint).
-
- * "git submodule update -f" did not update paths in the working tree
-   that has local changes.
-   (merge 01d4721 sz/submodule-force-update later to maint).
-
- * We used curl_easy_strerror() without checking version of cURL,
-   breaking the build for versions before curl 7.12.0.
-   (merge 4246b0b js/no-curl-easy-strerror-on-old-curl later to maint).
-
- * Code to work around MacOS X UTF-8 gotcha has been cleaned up.
-   (merge 9a27f96 rr/precompose-utf8-cleanup later to maint).
-
- * Documentation for the configuration file format had a confusing
-   example.
-   (merge d1e1fe7 mh/maint-config-doc-proxy-command later to maint).
-
- * "git submodule <cmd> path" did not error out when the path to the
-   submodule was misspelt.
-   (merge be9d0a3 hv/submodule-path-unmatch later to maint).
-
- * Some capabilities were asked by fetch-pack even when upload-pack
-   did not advertise that they are available.  fetch-pack has been
-   fixed not to do so.
-
- * The output from "git diff -B" for a file that ends with an
-   incomplete line did not put "\ No newline..." on a line of its own.