Log Message:
Update net/vnstat to 1.11

Fix a few pkglint warnings

Upstream changes
----------------

1.11 / 1-Jun-11

 - Fix: Memory allocation was miscalculated when creating interface list from
   /sys/class/net when /proc/net/dev wasn't available which in turn could
   crash the daemon
 - Fix: Daemon database cache could remain empty after a -HUP signal
 - Fix: Don't make temp directory in vnstat.cgi writable for everyone
 - Import GNU/kFreeBSD support from Debian
   (#608963, patch by Mats Erik Andersson)
 - Remove usage of GNU only '-D' option for install for BSD in Makefile
 - The daemon now automatically creates databases for available interfaces
   if no databases are found during startup

1.10 / 2-Jan-10

 - Fix: Buffer overflow was possible in hourly image output when RateUnit=1
   and HourlyRate=1
 - Fix: Minor memory leak was possible in the handling of HUP signal in daemon
 - Fix: Graphical elements weren't correctly aligned in summary image
   when header wasn't visible (-nh)
 - Fix: --delete didn't work
 - Possibility to merge statistics from several databases and save
   the end result to a new database (--mergesaved)
 - Added validation of database cache in daemon in order to be more robust
   in case of system memory corruption
 - Support for --style to -l (live mode)
 - Alternative print mode to -l (live mode) with optional parameter
 - Present options and elements in man pages in alphabetical order
 - Code cleanup