package/davfs2: add davfs2 user and group

mount.davfs expects the availability of the user and group davfs2.

Signed-off-by: Sven Klomp <mail@klomp.eu>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit a2b98a6add92e38dbcd4ca9fda25454a38c719e3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/davfs2/davfs2.mk

@@ -18,4 +18,8 @@ DAVFS2_CONF_ENV += \
 	ac_cv_path_NEON_CONFIG=$(STAGING_DIR)/usr/bin/neon-config \
 	LIBS=$(TARGET_NLS_LIBS)
 
+define DAVFS2_USERS
+        davfs2 -1 davfs2 -1 * - - - davfs user
+endef
+
 $(eval $(autotools-package))