add instance field to webdav backend struct webdav

add empty pg webdav funcs webdav

fix error handling in pg_remove_res webdav

handle sql error in pg_remove_res webdav

implement pg rmdir webdav

add pg mkdir tests webdav

implement pg unlink webdav

(0) -100 -30 -10 -7 +7 +10 +30 +100 tip

mercurial