Update release notes to 2.7

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

Documentation/RelNotes/2.7.0.txt

@@ -6,6 +6,10 @@ Updates since v2.6
 
 UI, Workflows & Features
 
+ * The appearance of "gitk", particularly on high DPI monitors, have
+   been improved.  "gitk" also comes with an undated translation for
+   Swedish and Japanese.
+
  * "git remote" learned "get-url" subcommand to show the URL for a
    given remote name used for fetching and pushing.
 
@@ -22,7 +26,7 @@ UI, Workflows & Features
 
  * Users who are too busy to type three extra keystrokes to ask for
    "git stash show -p" can now set stash.showPatch configuration
-   varible to true to always see the actual patch, not just the list
+   variable to true to always see the actual patch, not just the list
    of paths affected with feel for the extent of damage via diffstat.
 
  * "quiltimport" allows to specify the series file by honoring the
@@ -65,7 +69,7 @@ UI, Workflows & Features
    a superset of "--no-progress".  Extend the command to support the
    usual "--[no-]progress".
 
- * The semantics of tranfer.hideRefs configuration variable have been
+ * The semantics of transfer.hideRefs configuration variable have been
    extended to work better with the ref "namespace" feature that lets
    you throw unrelated bunches of repositories in a single physical
    repository and virtually serve them as separate ones.
@@ -79,6 +83,12 @@ UI, Workflows & Features
  * The credential-cache daemon can be told to ignore SIGHUP to work
    around issue when running Git from inside emacs.
 
+ * "git push" learned new configuration for doing "--recurse-submodules"
+   on each push.
+
+ * "format-patch" has learned a new option to zero-out the commit
+   object name on the mbox "From " line.
+
 
 Performance, Internal Implementation, Development Support etc.
 
@@ -370,4 +380,21 @@ notes for details).
    them instead, with a new configuration git-p4.keepEmptyCommits as a
    backward compatibility knob.
 
+ * The completion script (in contrib/) used to list "git column"
+   (which is not an end-user facing command) as one of the choices
+   (merge 160fcdb sg/completion-no-column later to maint).
+
+ * The error reporting from "git send-email", when SMTP TLS fails, has
+   been improved.
+   (merge 9d60524 jk/send-email-ssl-errors later to maint).
+
+ * When getpwuid() on the system returned NULL (e.g. the user is not
+   in the /etc/passwd file or other uid-to-name mappings), the
+   codepath to find who the user is to record it in the reflog barfed
+   and died.  Loosen the check in this codepath, which already accepts
+   questionable ident string (e.g. host part of the e-mail address is
+   obviously bogus), and in general when we operate fmt_ident() function
+   in non-strict mode.
+   (merge 92bcbb9 jk/ident-loosen-getpwuid later to maint).
+
  * Code clean-up, minor fixes etc.