Fix docs mising Search permission for example. - addition Gratuitous whiespace change to add: The All users may only view and edit issues, files and messages they create example was missing the addition of Search permission. The example predates the existence of the Search permission. See: https://sourceforge.net/p/roundup/mailman/message/37390174/ for initial report.

--- a/doc/customizing.txt	Wed Nov 24 10:04:10 2021 -0500
+++ b/doc/customizing.txt	Wed Nov 24 10:53:39 2021 -0500
@@ -6155,3 +6155,4 @@
 .. _`directions in the rest interface documentation`: rest.html#enabling-the-rest-api
 .. _`xmlrpc interface documentation`: xmlrpc.html#through-roundup
 .. _`zxcvbn`: https://github.com/dwolfhub/zxcvbn-python
+