docs: spelling fixes Squashed into 1 commit because I'm lazy: - non-existant -> nonexistent - accros -> across - comptatibility -> compatibility - requieres -> requires - aliast -> alias - unexistent -> nonexistent - convertion -> conversion - nto -> not

test-drop.t
test-inhibit.t
test-simple4server.t
tests/test-simple4server-bundle2.t