Item13382: Permit user & pass in proxy URL

user and pass were separate options that Configure/Value.pm didn't
accommodate.

NTLM auth is probably still not usable, but this fixes the configure
errors.

core/lib/Foswiki.spec

@@ -1038,7 +1038,8 @@ $Foswiki::cfg{AccessibleENV} =
 # Some environments require outbound HTTP traffic to go through a proxy
 # server (for example http://proxy.your.company).
 
-# **URL 30 LABEL="Proxy Host" CHECK='undefok emptyok parts:scheme,authority,path,user,pass  \
+# **URL 30 LABEL="Proxy Host" CHECK='undefok emptyok parts:scheme,authority,path\
+#              user pass  \
 #              partsreq:scheme,authority \
 #              schemes:http,https \
 #              authtype:hostip' **

core/lib/Foswiki/Configure/Value.pm

@@ -100,6 +100,8 @@ our %CHECK_options = (
     partsreq => -1,    # for URL
     perms    => -1,    # file permissions
     schemes  => -1,    # for URL
+    user     => -1,    # for URL
+    pass     => -1,    # for URL
 );
 
 our %rename_options = ( nullok => 'undefok' );