Add support for argNpath in add_signal_receiver

As requested in !21 (closed) this add supports for argNpath, to match path like arguments of signals. Tests from the dbus-specification are included in a test-case. It is currently based on master, I happily rebase it, once the arg0namespace has been reviewed.

added 1. Feature 4. Changes requested labels

added 11 commits

• 229dc124...f74338c7 - 9 commits from branch dbus:master
• d6d84e08 - Add support for argNpath in add_signal_receiver
• fac6eb0b - test: Add basic coverage for argNpatch matches

Compare with previous version

It is now rebased and includes your suggestions. I added two test to check that the empty strings don't throw exceptions.

removed 4. Changes requested label

added 4 commits

• fac6eb0b...b712fb91 - 2 commits from branch dbus:master
• 4540beb0 - Add support for argNpath in add_signal_receiver
• cd745679 - test: Add basic coverage for argNpatch matches

Compare with previous version

resolved all threads

v3: rebased to make the CI hopefully work again, no functional changes

approved this merge request

enabled an automatic merge when the pipeline for cd745679 succeeds

requested review from @smcv

Queued for merging if CI passes, thanks! If CI fails then we'll need to take another look.

mentioned in commit 220e302a

merged