implement pg vfs mkdir webdav

add first pg vfs tests webdav

create pg test data webdav

prepare build system for postgresql plugin tests webdav

set error status code directly in vfs_* calls webdav

add support for O_CREAT flag in postgresql vfs webdav

(0) -100 -30 -10 -6 +6 +10 +30 +100 tip

mercurial