imagex-update.1.in: Add note about setting ignore case

diff --git a/doc/imagex-update.1.in b/doc/imagex-update.1.in
index d7164b07c952744f143e8709a87506bdde1f5da7..fa81cb3e312c9d19c4825d69fcf0acd9bf72fc62 100644 (file)
--- a/doc/imagex-update.1.in
+++ b/doc/imagex-update.1.in
@@ -139,8 +139,10 @@ subdirectory named "Public" in this directory must be specified as
 All paths to files or directories within the WIM image must be specified
 relative to the root of the image.  However, the leading slash is optional, and
 both forward slashes and backslashes are accepted.  In addition, on Windows, the
-paths are treated case-insensitively, while on UNIX-like systems, the paths are
-treated case-sensitively.
+paths are by default treated case-insensitively, while on UNIX-like systems, the
+paths are by default treated case-sensitively.  The default case sensitivity may
+be changed by setting the \fBWIMLIB_IMAGEX_IGNORE_CASE\fR environmental
+variable to 0 or 1.
 .PP
 The command file (\fICMDFILE\fR) is parsed by \fB@IMAGEX_PROGNAME@ update\fR
 itself and not by the system shell.  Therefore, its syntax is limited.  However,