Haketilo

fix setting of 'blocked-blocked<...>-' attributes and add tests

display an informative message in settings page if IndexedDB cannot be accessed

include $schema property in internally-generated resources/mappings

optimize Pattern Query Tree for size of its JSON.stringify()'ed representation

stop haketilo() fixture cleanup from closing last browser window

validate repository responses against JSON schemas

• compute_scripts.awk (include_file): don't enforce specific path format on #INCLUDE'd files
• .gitmodules, schemas: add Haketilo JSON schemas subrepo
• html/install.js (InstallView): import schema validator and run it against downloaded mapping and resource definitions...

fix URL construction when downloading definitions from Hydrilla

make "uuid" an optional property

automatically pick up a free port to run the HTTP proxy on

It is now possible to run multiple make test commands in parallel (e.g. testing abrowser and librewolf simultaneously after running configure for each of them in 2 different directories).

fix test-environment* targets