OpenVAS Scanner v6.0+beta2

This is the second beta release of the openvas-scanner module 6.0 for the
Greenbone Vulnerability Management (GVM) framework.

The module covers a number of significant advances and clean-ups.

Many thanks to everyone who has contributed to this release:
Hani Benhabiles, Christian Fischer, Matt Mundell, Juan Jose Nicola,
Bjoern Ricks, Jan-Oliver Wagner and Michael Wiegand.

Main changes compared to openvas-scanner 6.0+beta1:

• A new command line option 'scan-start' with a scan ID has been added. This
  add support for non-OTP clients.
• Handling of vhosts and multiple domain names has been improved.
• Setting 'kb_location' has been renamed to 'db_address'.
• Cleanup of plugin child processes has been improved.
• Routines for tcp and udp required ports checks have been improved.
• An issue caused by password quotation has been addressed.
• Script version has been removed.
• Script copyright has been removed.
• An issue which caused a hanging scan process has been addressed.
• An issue related to WMI_HANDLE which caused a segmentation fault has
  been addressed.
• NASL get_host_names() API has been added.
• Several code style improvements have been done.
• Several performance improvements have been done.
• The plugin scheduler has been improved.
• Define MAXPATHLEN for specific downstream architectures.
• An issue which caused parameter pollution in certain NASL functions
  has been addressed.
• NASL function resolve_host_name() has been added.
• Unused preference use_mac_addr has been removed.
• Issues in building process have been addressed.
• Defaults to expand_vhosts if no preference was given is set to yes.
• NASL function get_ssl_compression() has been removed.
• Compatibility mode in GnuTLS priority string has been enabled.
• GnuTLS RC4 + COMPAT in set_gnutls_protocol() have been enabled.
• Several issues reported by Coverity have been addressed.
• Documentation has been improved.