fast way to update jails (FreeBSD 10.0 host)

[Nicolas de Bari Embriz Garcia Rojas]

Hi, I just updated the host from 9.2 to 10.0.

What I plan to do  for each jail is:

# $D is the home of the jail.
make installworld DESTDIR=$D SRCCONF=/etc/src-jail.conf
cp -R $D/etc $D/etc.old
make distribution DESTDIR=$D SRCCONF=/etc/src-jail.conf

Basically to avoid all the ‘mergmaster’ stuff
 
Is there a better way? 

any suggestions?

regards.