Merge branch 'dt/log-follow-config' into maint

Description of the "log.follow" configuration variable in "git log"
documentation is now also copied to "git config" documentation.

* dt/log-follow-config:
  log: Update log.follow doc and add to config.txt

Documentation/config.txt

@@ -1840,6 +1840,12 @@ log.decorate::
 	specified, the full ref name (including prefix) will be printed.
 	This is the same as the log commands '--decorate' option.
 
+log.follow::
+	If `true`, `git log` will act as if the `--follow` option was used when
+	a single <path> is given.  This has the same limitations as `--follow`,
+	i.e. it cannot be used to follow multiple files and does not work well
+	on non-linear history.
+
 log.showRoot::
 	If true, the initial commit will be shown as a big creation event.
 	This is equivalent to a diff against an empty tree.

Documentation/git-log.txt

@@ -185,10 +185,10 @@ log.date::
 	dates like `Sat May 8 19:35:34 2010 -0500`.
 
 log.follow::
-	If a single <path> is given to git log, it will act as
-	if the `--follow` option was also used.  This has the same
-	limitations as `--follow`, i.e. it cannot be used to follow
-	multiple files and does not work well on non-linear history.
+	If `true`, `git log` will act as if the `--follow` option was used when
+	a single <path> is given.  This has the same limitations as `--follow`,
+	i.e. it cannot be used to follow multiple files and does not work well
+	on non-linear history.
 
 log.showRoot::
 	If `false`, `git log` and related commands will not treat the