Merge branch 'nd/for-each-ref-ignore-case'

"git branch --list" and friends learned "--ignore-case" option to
optionally sort branches and tags case insensitively.

* nd/for-each-ref-ignore-case:
  tag, branch, for-each-ref: add --ignore-case for sorting and filtering

Documentation/git-branch.txt

@@ -118,6 +118,10 @@ OPTIONS
 	default to color output.
 	Same as `--color=never`.
 
+-i::
+--ignore-case::
+	Sorting and filtering branches are case insensitive.
+
 --column[=<options>]::
 --no-column::
 	Display branch listing in columns. See configuration variable

Documentation/git-for-each-ref.txt

@@ -79,6 +79,9 @@ OPTIONS
 	Only list refs which contain the specified commit (HEAD if not
 	specified).
 
+--ignore-case::
+	Sorting and filtering refs are case insensitive.
+
 FIELD NAMES
 -----------
 

Documentation/git-tag.txt

@@ -108,6 +108,10 @@ OPTIONS
 	variable if it exists, or lexicographic order otherwise. See
 	linkgit:git-config[1].
 
+-i::
+--ignore-case::
+	Sorting and filtering tags are case insensitive.
+
 --column[=<options>]::
 --no-column::
 	Display tag listing in columns. See configuration variable