Sort rewrite to be SUSv3 compliant. New config option, updated help, and

a couple of infrastructure bits.

coreutils/Config.in

@@ -398,6 +398,18 @@ config CONFIG_SORT
 	help
 	  sort is used to sort lines of text in specified files.
 
+config CONFIG_SORT_BIG
+	bool "  full SuSv3 compliant sort (Support -ktcsbdfiozgM)"
+	default y
+	depends on CONFIG_SORT
+	help
+	  Without this, sort only supports  -r, -u, and an integer version
+	  of -n.  Selecting this adds sort keys, floating point support, and
+	  more.  This adds a little over 3k to a nonstatic build on x86.
+
+	  The SuSv3 sort standard is available at:
+	  http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
+
 config CONFIG_STTY
 	bool "stty"
 	default n