[master] renamed file name 'NOTES’to more specific one for its content.

the note written there often seems to be overlooked and ignored as a result.
while it's not clear the new file name really helps, but we'll at least
give it a try.  discussed on jabber.

tests/lettuce/configurations/DO_NOT_USE_127.0.0.1:47807

@@ -0,0 +1,6 @@
+Note well:
+
+In some configuration we intentionally use an IPv6 address (::1) with
+port 47807.  DO NOT CHANGE THAT; at least do not change it to
+127.0.0.1:47807.  See git e3f4b290d17a68db728166cdffcbe93517966e8b
+for why.

tests/lettuce/configurations/NOTES

@@ -1,4 +0,0 @@
-- In some configuration we intentionally use an IPv6 address (::1) with
-  port 47807.  DO NOT CHANGE THAT; at least do not change it to
-  127.0.0.1:47807.  See git e3f4b290d17a68db728166cdffcbe93517966e8b
-  for why.