Bug#622599: udav: Update to new upstream version

[Salvatore Bonaccorso]

Source: udav
Version: 0.6.3-2
Severity: wishlist

I would like to wait for it until mathgl builds again on all
architectures.

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/8 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash