relink all option to opatch auto

I've been applying quarterly patches for about 4 years now.  To minimize the disruption to the database, we do Linux yum update and oracle patching in the same maintenance window.  The sequence is

1) yum update

2) srvctl stop home for database home (we do this so database instances stay down and save the shutdown time on forthcoming opatch auto)

3) reboot because of OS update

4) opatch auto

I had always assumed that opatch auto relinked everything, but because of a recent service request I have discovered it only relinks what has been patched.

In my case, I'd have to shutdown the whole stack (GI and RDBMS), do the relink all and restart again.  This is a non-trivial amount of added time.