add proppatch interface webdav

make multistatus response ready for proppatch requests webdav

fix multistatus response and add propfind tests webdav

handle missing properties in multistatus.c webdav

fix response href webdav

add handler for http expect header webdav

(0) -100 -30 -10 -6 +6 +10 +30 +100 +300 tip

mercurial