The patch allows to specify in an address line windows unc-path like a "\\server\share" which will be converted to the posix pathname format "smb://server/share".
To apply the patch you must do:
cp krsmb-2.2.0-beta1.patch krusader-2.2.0-beta1/krusader/Panel
patch panelfunc.cpp < krsmb-2.2.0-beta1.patch
for krusader-2.2.0-beta1