www-cgi/: Clean up environment filtering doc

Reword this a bit so it makes sense as a text doc, and make some minor
formatting changes.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/www-cgi/README.custom-env-filter b/www-cgi/README.custom-env-filter
index 5ebc1db1d379df09780f2de2c5ab989de7bc5392..58ef39b3698670ffd78aa7f9e64deea0cdaca40c 100644 (file)
--- a/www-cgi/README.custom-env-filter
+++ b/www-cgi/README.custom-env-filter
@@ -1,14 +1,14 @@
-www-cgi/: Allow customization of the environment filters.
+Allow customization of the environment filters.
     
-Sites can now configure `ucgi's environment filters, and end users can
-configure `ucgitarget's filters.
+Sites can configure ucgi's environment filters, and end users can
+configure ucgitarget's filters.
 
-By default, `ucgi' will look in `/etc/userv/ucgi.env-filter', but if
-`UCGI_ENV_FILTER' is set in its environment, it will look there
+By default, ucgi will look in /etc/userv/ucgi.env-filter, but if
+UCGI_ENV_FILTER is set in its environment, it will look there
 instead.  The filter may contain wildcards and so on.
 
-By default, `ucgitarget' looks in `.userv/ucgitarget.env-filter', or
-`/etc/userv/ucgitarget.env-filter', if the former doesn't exist; but if
+By default, ucgitarget looks in .userv/ucgitarget.env-filter, or
+/etc/userv/ucgitarget.env-filter, if the former doesn't exist; but if
 passed a `-e FILTER' option on its command line, it will look in the
 file FILTER instead.  This filter may /not/ contain wildcards.
 
@@ -23,4 +23,5 @@ variables to a service program in a Userv configuration file, but easy
 to pass command-line arguments.
 
 
-www-cgi: Introduce `?DEFAULTS' pattern to match the default set.
+The `?DEFAULTS' pattern can be specified to match the default set
+(which is different in `ucgi' and `ucgitarget').