Change configure.in to note that since we are using expr(1)'s regex match

command, the entries in template/.similar can really be regular
expressions.  This isn't a new feature, just an observation of what the
code already did.

src/configure.in

@@ -96,14 +96,13 @@ host="`echo $host | tr '[[A-Z]]' '[[a-z]]'`"
 if test -f "template/$host"
 then TEMPLATE="$host"
 else
-    # Next try for an exact match to a .similar entry.
-    # There shouldn't be multiple matches, but take the last if there are.
-    GUESS=`grep "^$host=" template/.similar | sed 's/^.*=//' | tail -1`
-    if test "$GUESS"
-    then TEMPLATE="$GUESS"
-    else
-	# Next look for a .similar entry that is a prefix of $host.
-	# If there are multiple matches, take the last one.
+    # Scan template/.similar for a rule that tells us which template to use.
+    # The format of each line of the file is
+    #           hostnamepattern=templatefilename
+    # where the hostnamepattern is evaluated per the rules of expr(1) ---
+    # namely, it is a standard regular expression with an implicit ^ at the
+    # start.  If multiple lines match, we will end up using the last match.
+    GUESS=""
     exec 4<template/.similar
     while read LINE <&4
     do
@@ -120,7 +119,6 @@ else
 	# Last chance ... maybe uname -s will match an entry.
 	TEMPLATE=`uname -s | tr '[[A-Z]]' '[[a-z]]'` 
     fi
-    fi
 fi
     ])
 AC_MSG_RESULT($TEMPLATE)
@@ -130,7 +128,7 @@ if test ! -f "template/$TEMPLATE"; then
 	echo ""
 	echo "$TEMPLATE does not exist"
 	echo ""
-	echo "Available Templates (set using --with-template):"
+	echo "Available Templates (select one using --with-template):"
 	echo ""
 	ls template
 	echo ""