Since the login form label for user_name unconditionally displays `Username or Email Address` for the `user_name` field, bring matching LDAP filters to more prominence in the documentation/placeholders. Signed-off-by: Gary Moon <gary@garymoon.net>  | 
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| .. | ||
| ldap.tmpl | ||
| oauth.tmpl | ||
| smtp.tmpl | ||
| sspi.tmpl | ||