For Jenkins 1.577, several help files were moved to LDAP plugin and therefore deleted in core, see https://github.com/jenkinsci/jenkins/commit/e91782e78f1ade105c5f9ce11088bf9c95618180.
The LDAP plugin's version (1.6) was not updated to the version containing the help files (1.11), so the help links are invalid unless you manually update LDAP plugin to 1.11.

Example link:
Manage Jenkins/Configure Global Security/Access Control: Security Realm = LDAP, help for "Server"