Mention the need for krb5.h

Closes #5674

diff --git a/docs/upgrading.rst b/docs/upgrading.rst
index d273a8837f1538e80d63258da30716bfbd54ebc9..f82465bfa582d3b314d853ee6bdf5b9313774b18 100644 (file)
--- a/docs/upgrading.rst
+++ b/docs/upgrading.rst
@@ -38,6 +38,9 @@ and ``--with-pgsql-config`` ``configure`` options have been deprecated.
 ``--with-pg-config`` to specify a path to a non-default ``pg_config`` if
 you have Postgresql installed in a non-default location.
 
+The improved :doc:`LDAP Backend <backends/ldap>` backend now requires Kerberos headers to be installed.
+Specifically, it needs `krb5.h` to be installed.
+
 4.0.X to 4.0.2
 --------------