Limit the EOF marker length to a maximum of 79

characters. [1]

Add $FreeBSD$ tag so that I can actually commit this.

PR:		bin/118782
Reported by:	Bjoern Koenig
Patch by:	edwin, Jaakko Heinonen (not used patch)
MFC after:	1 week
Approved by:	imp (mentor, implicit)

usr.bin/shar/shar.sh

@@ -33,6 +33,7 @@
 #
 #	@(#)shar.sh	8.1 (Berkeley) 6/6/93
 #
+# $FreeBSD$
 
 if [ $# -eq 0 ]; then
 	echo 'usage: shar file ...' 1>&2
@@ -70,10 +71,12 @@ do
 		echo "echo c - $i"
 		echo "mkdir -p $i > /dev/null 2>&1"
 	else
+		md5sum=`echo -n $i | md5`
+		eofmarker="END-of-$md5sum"
 		echo "echo x - $i"
-		echo "sed 's/^X//' >$i << 'END-of-$i'"
+		echo "sed 's/^X//' >$i << '$md5sum'"
 		sed 's/^/X/' $i || exit
-		echo "END-of-$i"
+		echo "$md5sum"
 	fi
 done
 echo exit