* cygwinenv.sgml: Add section for 'CYGWIN codepage:[ansi|oem]'

winsup/utils/utils.sgml

@@ -843,6 +843,9 @@ Options for 'set' Action:
  -m, --multi-string   set type to REG_MULTI_SZ
  -s, --string         set type to REG_SZ
 
+Options for 'set' and 'unset' Actions:
+ -K<c>, --key-separator[=]<c>  set key separator to <c> instead of '\'
+
 Other Options:
  -h, --help     output usage information and exit
  -q, --quiet    no error output, just nonzero return if KEY/VALUE missing
@@ -916,6 +919,12 @@ a regular string.
 The <literal>unset</literal> action removes a value from a key.
 </para>
 
+<para>
+By default, the last "\" or "/" is assumed to be the separator between the
+key and the value.  You can use the <literal>-K</literal> option to provide 
+an alternate key/value separator character.
+</para>
+
 </sect2>
 
 <sect2 id="setfacl"><title>setfacl</title>