Log Message:
Update libnasl, nessus{-core,-libraries,-plugins} to 2.0.7.

Based on pr pkg/22356 by Adrian Portelli.

Changes since 2.0.6a:

. changes by Renaud Deraison (deraison@cvs.nessus.org)
- Fixed bad performances issues when pinging dead hosts
- Fixed a bug which would prevent to store items larger than 2kb in the KB
- NFS and SMB file-related functions completed (open, read and cwd are
  implemented)
- Plugins support for Windows 2003
- Network IPs can now be evenly sliced instead of being scanned
  sequentially
- User-definable source-IP(s) for the checks (nessusd -S)
- Fixed a possible message corruption problem if a plugin was to send a too
  long message back to nessusd
- Fixed a possible plugin corruption problem when the client overwrites
  existing plugins
- Fixed various false positives and wording issues in several plugins