lftp: updated to 4.7.1

davfs2: updated to 1.5.3 and reintroduced support for libssp

Signed-off-by: Federico Di Marco <fededim@gmail.com>

net/davfs2/patches/010-main_code_fix.patch

@@ -1,16 +1,3 @@
---- a/src/Makefile.am
-+++ b/src/Makefile.am
-@@ -32,8 +32,8 @@ mount_davfs_SOURCES = cache.c dav_coda.c
-         kernel_interface.h mount_davfs.h webdav.h
- umount_davfs_SOURCES = umount_davfs.c defaults.h
- 
--AM_CFLAGS = -Wall -Werror=format-security \
--        -fstack-protector --param=ssp-buffer-size=4
-+AM_CFLAGS = -Wall -Werror=format-security 
-+#        -fstack-protector --param=ssp-buffer-size=4  -- removed ssp not supported in openwrt
- DEFS = -DPROGRAM_NAME=\"mount.davfs\" \
-        -DDAV_SYS_CONF_DIR=\"$(pkgsysconfdir)\" \
-        -DDAV_LOCALSTATE_DIR=\"$(dav_localstatedir)\" \
 --- a/src/cache.c
 +++ b/src/cache.c
 @@ -58,7 +58,7 @@