The HgPermissionFilter will now inspect the used mercurial command, of all requests which are using a read method like GET, HEAD, OPTIONS or TRACE and tread every one as write request, expect:
- no command was specified with the request (this is required for the hgweb ui)
- the command in the query string was found in the list of read commands
- if query string contains the batch command, then all commands specified in X-HgArg headers must be in the list of read commands
This change is required, in order to fix CVE-2018-1000132 for SCM-Manager.
