Main/HostDnsService: Poll for VBoxInternal2/HostDNSOrderIgnore global extradata change, at most every 30 seconds, and only if there is new DNS information. This helps greatly with enabling/disabling this feature, as previously one had to ensure that VBoxSVC was terminated/re-started.

Main/HostDnsService: if VBoxInternal2/HostDNSOrderIgnore global extradata is set to a value other than "0", don't send notification when only the order of nameservers changed.

Main/HostDnsService: use <iprt/cpp/lock.h> instead of a roll-your-own version.

Main/HostDnsService: drop const from VirtualBox *aParent as GetExtraData() method is not const.

Main/HostDnsService: instead of keeping fragile state g/c notifyAll() and just notify proxy directly from setInfo() when info changed.

Main/src-server/HostDnsService.cpp: make sure that only actual information changes trigger notifications, as the Windows backend likes to call HostDnsService::notifyAll when nothing changed

Main/HostDnsService: brush up old Windows code. In general no functional change is intended, but make search list handling follow Windows behavior.

Main/HostDnsService: revert windows code back to r91891. The rewrite in r96327 is wrong. I can't seem to find any paper trail for what was the problem with the original code, but at least it monitors the right place in the registry.

Main/HostDnsService: bring back Windows changes of r96331 but with plain std::string in HostDnsInformation and using explicit Unicode API and wchar_t when dealing with registry (we always compile with -DUNICODE, so no need for TCHAR shim). No changes to the original except minor const correctness tweaks.

Main/HostDnsService: revert r96327 and follow-up r96329 and r96331 to revert conversion of HostDnsInformation to Unicode. HostDnsServiceWin.cpp behavioral changes will be redone as a separate commit against old definition of HostDnsInformation. Intervening SafeArray cleanup in r96372 is preserved, hopefully without errors. Please review.

Main: safearray cleanup, removed unnecessary SafeArray<->vector conversions

Main: DnsMonitorService: step on unicode rails: store network configuration in unicode-compatible containner (std::wstring) (preliminary tested on Linux, Mac and Windows); DnsMonitorService for Windows: reworked in order to subscribe to correct events and filter-out those ones we don't interested in. (Experimantal, needs more testing and review).

Main/HostDnsService: - Generic part could be used with threading on or off: OS which can monitor changes on DNS structures might need this (e.g. Windows, Darwin, Linux) - ResolvConf based (Linux, Solaris, FreeBSD ans Os/2) doesn't use scanf based resovl.conf parsing new Slirp's parser used instead. It's configured to provide strings instead of addresses. (to resolve xtracker/7034c2) - Darwin monitoring code has been refactored. - linux changed to handle cases described in xtracker/7034c3 - Windows monitors changes on register changes.

Various FreeBSD fixes submitted Bernhard Froehlich

Main/HostDnsService: fixed object deletion and coding style

Main/HostDnsServiceSolaris: Attempt to fix Solaris build.

Main/HostDnsService: splits HostDnsService on "singleton" HostDnsMonitor which monitors host changes and share DnsInformation to per HostImpl/VirtualBoxImpl objects HostDnsMonitorProxy. TODO: Win/Darwin parts might burn (not tested) TODO: find good place to call HostDnsMonitor::shutdown() to stop monitoring thread. (ref counting could be used on HostDnsMonitor::addMonitorProxy and HostDnsMonitor::releaseMonitorProxy, but it better to pausing monitoring on no --auto-shutdown launches of VBoxSVC).

Main/HostDnsService: Lockee & ALock (not used for now).

Main/HostDnsService.h: puvlic -> public.

Main/HostDnsService.h: c++-mode (indentation).

Makefile.kmk: adds HostDnsServiceLinux.cpp to build on Linux host HostDnsService.h: adds declarations of defined functions.

Main: Whitespace (including tabs!) and svn:keywords cleanups by scm.

Main: typo: HostDnsServiceResolvConf::init(VirtualBox *->const VirtualBox *)

Main: HostDnsServiceWin::init(void) -> HostDnsServiceWin::init(const VirtualBox *aParent) and firing event on update.

header fixes

Main/DNS: general host specific DNS and Co handling added. Darwin implementation has self-update mechanism, for other hosts it's in todo list.