Fix an intensive idiom

Signed-off-by: Michael Friedrich <michael.friedrich@netways.de>
Update db_model.xml

Relationship belongs to contactnotifications table.

Signed-off-by: Wolfgang Nieder <wnd@gmx.net>
Update db_model.xml

Relationship belongs to contactnotifications table.

Signed-off-by: Wolfgang Nieder <wnd@gmx.net>
docs issue 5624: add default values to object definitions
Doc: Define SELinux contexts / use semanage.

Ref #3555
Doc: install separate JSON package if PHP >= 5.5

Ref: issue #4507
Merge branch 'master' into next