Despite the fact that it is possible to generate a custom manifest as described in war-manifest-guide, it's not good enough when using the overlays mechanism. The maven-war-plugin can't take into account an existing manifest. It can just generate a new one with the corresponding configuration in the pom.
However, if you use the overlays mechanism, you rather want to keep the manifest from your common war (see custom-manifest-war-overlays.zip in attachment).
|Component/s||overlay [ 14514 ]|
|Component/s||manifest [ 14515 ]|
|Status||Open [ 1 ]||Closed [ 6 ]|
|Assignee||Olivier Lamy [ olamy ]|
|Resolution||Not A Bug [ 6 ]|