Get Darwin to use md5 (and not the locally compiled coreutils/md5sum).

test/functions.source

@@ -426,8 +426,7 @@ copyVideoFiles ()
 # print checksum for one file
 checkSum()
 {
-    platform=$(uname)
-    if [ "$platform" == 'NetBSD' -o "$platform" == 'FreeBSD' -o "$platform" == 'Darwin' ]; then
+    if [ "$PLATFORM" == 'NetBSD' -o "$PLATFORM" == 'FreeBSD' -o "$PLATFORM" == 'Darwin' ]; then
         md5 -q $1
     else
         md5sum $1 | cut -d' ' -f 1
@@ -460,7 +459,7 @@ startHttpServer() {
 }
 
 ##
-# closeHttpServer - power down the python web server
+# cloaseHttpServer - power down the python web server
 closeHttpServer() {
     if [ ! -z $exiv2_httpServer ]; then
         echo kill  exiv2_httpServer $exiv2_httpServer