Description: Document that --color ir required for GREP_COLORS
Bug-Debian: http://bugs.debian.org/792385

Index: grep/doc/grep.in.1
===================================================================
--- grep.orig/doc/grep.in.1
+++ grep/doc/grep.in.1
@@ -1034,6 +1034,11 @@ with the
 and
 .B ne
 boolean capabilities omitted (i.e., false).
+Requires
+.B \-\^\-color 
+to be
+.BR always ", or " auto 
+for this environment variable to be taken into account.
 Supported capabilities are as follows.
 .RS
 .TP