tests: extract HTTP permissions tests to own test file

We're about to implement a lot more coverage of the permissions
mechanism. In preparation for that, establish a new test file
to hold permissions checks.

As part of this, we inline the important parts of the "req" helper
function.

tests/test-http-permissions.t

@@ -0,0 +1,52 b''
+#require killdaemons
+
+  $ hg init test
+  $ cd test
+  $ echo a > a
+  $ hg ci -Ama
+  adding a
+  $ cd ..
+  $ hg clone test test2
+  updating to branch default
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cd test2
+  $ echo a >> a
+  $ hg ci -mb
+  $ cd ../test
+
+expect authorization error: all users denied
+
+  $ cat > .hg/hgrc <<EOF
+  > [web]
+  > push_ssl = false
+  > deny_push = *
+  > EOF
+
+  $ hg serve -p $HGPORT -d --pid-file hg.pid
+  $ cat hg.pid > $DAEMON_PIDS
+
+  $ hg --cwd ../test2 push http://localhost:$HGPORT/
+  pushing to http://localhost:$HGPORT/
+  searching for changes
+  abort: authorization failed
+  [255]
+
+  $ killdaemons.py
+
+expect authorization error: some users denied, users must be authenticated
+
+  $ cat > .hg/hgrc <<EOF
+  > [web]
+  > push_ssl = false
+  > deny_push = unperson
+  > EOF
+
+  $ hg serve -p $HGPORT -d --pid-file hg.pid
+  $ cat hg.pid > $DAEMON_PIDS
+  $ hg --cwd ../test2 push http://localhost:$HGPORT/
+  pushing to http://localhost:$HGPORT/
+  searching for changes
+  abort: authorization failed
+  [255]
+
+  $ killdaemons.py

tests/test-push-http.t

@@ -307,28 +307,6 b' Make phases updates work'
   $ hg --config extensions.strip= strip -r 1:
   saved backup bundle to $TESTTMP/test/.hg/strip-backup/ba677d0156c1-eea704d7-backup.hg
 
-expect authorization error: all users denied
-
-  $ echo '[web]' > .hg/hgrc
-  $ echo 'push_ssl = false' >> .hg/hgrc
-  $ echo 'deny_push = *' >> .hg/hgrc
-  $ req
-  pushing to http://localhost:$HGPORT/
-  searching for changes
-  abort: authorization failed
-  % serve errors
-  [255]
-
-expect authorization error: some users denied, users must be authenticated
-
-  $ echo 'deny_push = unperson' >> .hg/hgrc
-  $ req
-  pushing to http://localhost:$HGPORT/
-  searching for changes
-  abort: authorization failed
-  % serve errors
-  [255]
-
 #if bundle2
 
   $ cat > .hg/hgrc <<EOF