added lost backend option

administrator/components/com_users/config.xml

@@ -258,7 +258,18 @@
 			cols="50"
 			filter="string"
 			>
-			</field>
+		</field>
+
+		<field
+			name="custom_chars_email"
+			type="textarea"
+			label="COM_USERS_CONFIG_FIELD_EMAIL_REGEX_LABEL"
+			description="COM_USERS_CONFIG_FIELD_EMAIL_REGEX_DESC"
+			rows="4"
+			cols="50"
+			filter="string"
+			>
+		</field>
 	</fieldset>
 
 	<fieldset

administrator/language/en-GB/en-GB.com_users.ini

@@ -71,11 +71,11 @@ COM_USERS_CONFIG_FIELD_USERACTIVATION_OPTION_ADMINACTIVATION="Administrator"
 COM_USERS_CONFIG_FIELD_USERACTIVATION_OPTION_SELFACTIVATION="Self"
 COM_USERS_CONFIG_FIELD_USERNAME_CHARSPRESET_LABEL="Characters preset"
 COM_USERS_CONFIG_FIELD_USERNAME_CHARSPRESET_DESC="Specify from the select list if you want disable this check or allow/forbid CUSTOM characters filling the CUSTOM text box. You can also select some of the specified character presettings: alphanumeric, latin, email,..."
-COM_USERS_CONFIG_FIELD_USERNAME_MINNUMCHARS_LABEL="MINimum number of characters"
-COM_USERS_CONFIG_FIELD_USERNAME_MINNUMCHARS_DESC="MINimum number of characters required for username field. Zero indicates no limit."
-COM_USERS_CONFIG_FIELD_USERNAME_MAXNUMCHARS_LABEL="MAXimum number of characters"
-COM_USERS_CONFIG_FIELD_USERNAME_MAXNUMCHARS_DESC="MAXimum number of characters required for username field. Zero indicates no limit."
-COM_USERS_CONFIG_FIELD_USERNAME_CHARSET_LABEL="CUSTOM character set"
+COM_USERS_CONFIG_FIELD_USERNAME_MINNUMCHARS_LABEL="Min. number of characters"
+COM_USERS_CONFIG_FIELD_USERNAME_MINNUMCHARS_DESC="Minimum number of characters required for username field. Zero indicates no limit."
+COM_USERS_CONFIG_FIELD_USERNAME_MAXNUMCHARS_LABEL="Max. number of characters"
+COM_USERS_CONFIG_FIELD_USERNAME_MAXNUMCHARS_DESC="Maximum number of characters required for username field. Zero indicates no limit."
+COM_USERS_CONFIG_FIELD_USERNAME_CHARSET_LABEL="Custom character set"
 COM_USERS_CONFIG_FIELD_USERNAME_CHARSET_DESC="CUSTOM character set ALLOWED/FORBIDDEN/REGEXP for username field. Select the appropriate behaviour in previous select list. If other than 'CUSTOM' is selected, this text box is not operational. Example allow/forbid: write 'abc' (without quotations) to allow/forbid these characters. For 'CUSTOM REGEXP' case, write a pattern to use inside a preg_match_all() function and all that match will be forbidden. Example regExp for 'latin only': '/[^\\\\\\\\p{Common}\\\\\\\\p{Latin}]/u' (without quotations)."
 COM_USERS_CONFIG_FIELD_USERNAME_CHARSPRESET_OPTION_DISABLECHECK="DISABLE characters check"
 COM_USERS_CONFIG_FIELD_USERNAME_CHARSPRESET_OPTION_CUSTOM_ALLOWED="CUSTOM is characters allowed"