Fix uwsgi config for trailing slashes

The apache mod_proxy documentation[0] says that trailing slashes need to
match for the ProxyPass statement. Since adding a slash to the redirected
url would break things that need to access endpoints like /identity
without anything added, we need to drop the trailing slash for the
target URL. See [1] for the discussion of the CVE fix that changed the
previous behavior.

[0] https://httpd.apache.org/docs/trunk/mod/mod_proxy.html#proxypass
[1] https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1945274

For stable/wallaby the nova-ceph-multistore job is currently broken,
drop it for now, it can be re-added when they got fixed.

Depends-On: https://review.opendev.org/c/openstack/devstack/+/811399
Change-Id: Ia6bae7419e5d9a9585f2316562a6c6bb968dcaa7

.zuul.yaml

@@ -712,10 +712,6 @@
             irrelevant-files:
               - ^.*\.rst$
               - ^doc/.*$
-        - nova-ceph-multistore:
-            irrelevant-files:
-              - ^.*\.rst$
-              - ^doc/.*$
     gate:
       jobs:
         - devstack
@@ -743,10 +739,6 @@
             irrelevant-files:
               - ^.*\.rst$
               - ^doc/.*$
-        - nova-ceph-multistore:
-            irrelevant-files:
-              - ^.*\.rst$
-              - ^doc/.*$
     # Please add a note on each job and conditions for the job not
     # being experimental any more, so we can keep this list somewhat
     # pruned.

lib/apache

@@ -306,7 +306,7 @@ function write_uwsgi_config {
         apache_conf=$(apache_site_config_for $name)
         iniset "$file" uwsgi socket "$socket"
         iniset "$file" uwsgi chmod-socket 666
-        echo "ProxyPass \"${url}\" \"unix:${socket}|uwsgi://uwsgi-uds-${name}/\" retry=0 " | sudo tee -a $apache_conf
+        echo "ProxyPass \"${url}\" \"unix:${socket}|uwsgi://uwsgi-uds-${name}\" retry=0 " | sudo tee -a $apache_conf
         enable_apache_site $name
         restart_apache_server
     fi