bsdinstall: fix a couple stragglers in whitelabeling the scripts

PR:		265797
Reviewed by:	allanjude, asiciliano
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D36235

usr.sbin/bsdinstall/scripts/checksum

@@ -68,7 +68,7 @@ for dist in $DISTRIBUTIONS; do
 		case $(/bin/freebsd-version -u) in
 		*-ALPHA*|*-CURRENT|*-STABLE|*-PRERELEASE)
 			bsddialog --backtitle "$OSNAME Installer" --title "Error" \
-			    --msgbox "The checksum for $dist does not match. It may have become corrupted, or it may be from a newer version of FreeBSD. Please check for a newer snapshot." 0 0
+			    --msgbox "The checksum for $dist does not match. It may have become corrupted, or it may be from a newer version of $OSNAME. Please check for a newer snapshot." 0 0
 			;;
 		*)
 			bsddialog --backtitle "$OSNAME Installer" --title "Error" \

usr.sbin/bsdinstall/scripts/fetchmissingdists

@@ -28,9 +28,12 @@
 # $FreeBSD$
 #
 
+BSDCFG_SHARE="/usr/share/bsdconfig"
+. $BSDCFG_SHARE/common.subr || exit 1
+
 error()
 {
-	bsddialog --backtitle "FreeBSD Installer" --title "Error" --msgbox "$1" 0 0
+	bsddialog --backtitle "$OSNAME Installer" --title "Error" --msgbox "$1" 0 0
 	exit 1
 }