Make test-rem test itself to ensure it always invokes remind as ../src/remind.

tests/test-rem

@@ -27,6 +27,16 @@ if test `id -u` = 0 ; then
     exit 1
 fi
 
+# Make sure all invocations of "remind" are ../src/remind!
+grep remind $0 | grep -v -F '../src/remind' > /dev/null 2>&1
+if test "$?" = 0 ; then
+    echo "*** test-rem seems to invoke remind without specifying it as ../src/remind"
+    echo "*** BAILING OUT"
+    exit 1
+fi
+
+
+
 # Set a known timezone so moon phases show up in predictable places
 TZ=UTC
 export TZ