While on regressions of OpenBSD's dhclient...

Handling of hostnames sent by the DHCP server has gone back to the  
buggy handling of dhclient 2.x

Hostnames like ....


Hostname sent via ISC dhcpd 3.x: dhcp194.private.gothic.net.au
         Used on FreeBSD 4.x, 5.x system: dhcp194.private.gothic.net.au
         Used on FreeBSD CURRENT (probably RELENG_6):  
64:68:63:70:31:39:34:2e:70:72:69:76:61:74:65:2e:67:6f:74:68:69:63:2e: 
6e:65:74:2e:61:75:0

See bin/83468

Basically, pretty_print_option() gets upset over the trailing NUL.  
Whether the server should be sending the NUL, or the client ignoring  
it, I don't know, but later versions of ISC dhclient do have a fix and  
that's attached to the PR

There's still the underlying problem that if the lease changes hostname  
while dhclient is running, dhclient won't change the hostname, but  
that's a common fault in both dhclient versions.