Bug#870633: ifenslave: Option bond-mode does not work

[bkw+1517636960]

Can somebody confirm that the workaround mentioned in the Ubuntu bug 
report is the approved way to do this?  If I'm reading that page 
correctly, I need to move my bond options out of the interfaces file and 
place them in /etc/modprobe.d/bonding.conf, like this:

"options bonding mode=active-backup miimon=100"
Is this correct?