docs: document joining of paths performed by web plugin for queries
docs: document joining of paths performed by web plugin for queries

beetbox/beets,shamangeorge/beets,shamangeorge/beets,sampsyo/beets,ibmibmibm/beets,beetbox/beets,jackwilsdon/beets,sampsyo/beets,ibmibmibm/beets,sampsyo/beets,beetbox/beets,shamangeorge/beets,ibmibmibm/beets,jackwilsdon/beets,shamangeorge/beets,jackwilsdon/beets,jackwilsdon/beets,beetbox/beets,sampsyo/beets,ibmibmibm/beets