• umount_davfs.c: Adjust message.
• umount_davfs.c: Remove call to setuid and setgid.
• mount_davs.c, check_dirs: Ignore EEXIST when creating DAV_SYS_RUN.
• umount_davfs.c: Replace GNU extension 'a' with option 'm' in fscanf.
• configure.ac, webdav.c: Check for inconv.h and iconv

Signed-off-by: Pierre-Yves <pyu@riseup.net>

• Add my user to the davfs2 group
• Create a mount point directory
• Add the mount point in /etc/fstab
• Mount the drive