Adjust the documentation about the different mm_* tables
Adjust the documentation about the different mm_* tables

These tables are only used if the authentication system is ``local``

Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2,Devyani-Divs/mirrormanager2,Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2,Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2,pombredanne/mirrormanager2