When building a kernel or the loader, let the hostname be overridden

sys/boot/common/newvers.sh

@@ -33,7 +33,7 @@
 #	@(#)newvers.sh	8.1 (Berkeley) 4/20/94
 
 LC_ALL=C; export LC_ALL
-u=${USER-root} h=`hostname` t=`date`
+u=${USER-root} h=${HOSTNAME-`hostname`} t=`date`
 #r=`head -n 6 $1 | tail -n 1 | awk -F: ' { print $1 } '`
 r=`awk -F: ' /^[0-9]\.[0-9]+:/ { print $1; exit }' $1`
 

sys/conf/newvers.sh

@@ -81,7 +81,7 @@ then
 fi
 
 touch version
-v=`cat version` u=${USER-root} d=`pwd` h=`hostname` t=`date`
+v=`cat version` u=${USER-root} d=`pwd` h=${HOSTNAME-`hostname`} t=`date`
 i=`make -V KERN_IDENT`
 cat << EOF > vers.c
 $COPYRIGHT