I just commited some changes that rename all ISDN related devices to
"sane" names. If you are using ISDN you will need to update your configuration!

The changes are:

 network interfaces:

   isp*    ->   ippp*  (ISDN PPP)
   ipr*    ->   irip*  (ISDN raw IP)

 character devices:

   /dev/i4b      ->  /dev/isdn
   /dev/i4bctl   ->  /dev/isdnctl
   /dev/i4brbch* ->  /dev/isdnbchan*
   /dev/i4btrc*  ->  /dev/isdntrc*

You will need to update:

 - your kernel config to match the new pseudo-device names
 - your isdn related userland tools (a make && make install in
   /usr/src/usr.sbin/isdn and /usr/src/sbin/pppoectl will do)
 - your /etc/isdn/isdnd.rc file
 - update /etc/rc.d/isdnd with the newes version from source
 - maybe ifconfig.* files if you use those for the network interfaces

Sorry for the inconvenience. If I broke anything please let me know
ASAP (prefered via send-pr).

Martin