Correctly name USB template manual page and install it by default.

Suggested by:	Sascha Wildner <swildner@gmail.com>
MFC after:	1 week
Add missing umoscom manual page.

Suggested by:	Sascha Wildner <swildner@gmail.com>
MFC after:	1 week
Add missing usfs manual page.

Suggested by:	Sascha Wildner <swildner@gmail.com>
MFC after:	1 week