Recent cmake versions are unhappy with embedding spaces in the
LL_TEST_ADDITIONAL_LIBRARIES property. Using semicolons to delimit libraries
seems to make it better.

The problem was that class-static LLUrlEntryParcel::sRegionHost was being
initialized by copying class-static LLHost::invalid. Naturally, these two
statics are initialized in different source files. Since C++ makes no promises
about the relative order in which objects in different object files are
initialized, it seems we hit a case in which we were trying to initialize
sRegionHost by copying a completely uninitialized LLHost::invalid.
In general we might attempt to address such cross-translation-unit issues by
introducing an LLSingleton. But in this particular case, the punch line is
that LLHost::invalid is explicitly constructed identically to a
default-constructed LLHost! In other words, LLHost::invalid provides nothing
we couldn't get from LLHost(). All it gives us is an opportunity for glitches
such as the above.
Remove LLHost::invalid and all references, replacing with LLHost().

See if this helps the linux build.  If not change will be needed to viewer-update-llapearance-utility repo

Removed HTTPSender, HTTPNullSender, HTTPCapSender.
Moved UntrustedMessageCap storage into LLHost
Added boost libraries to PROJECT_x_TEST linkage.

MAINT-5500: Finish converting the AIS responders to the new coroutine model, Cleaned up dead an unused code.
MAINT-4952: Added COPY and MOVE methods to Core:Http adapter

Converted All AISv3 commands (except copyLibrary) to coro model.

in LLUUID::operator==(LLUUID const &) and  LLFolderView::removeSelectedItems()

Removed some commented out code I had missed earlier
Moved costing to virtual function in uploadinfo.

Forgot to remove an unused varable and renamed NewFileResourceUploadInfo to LLNewFileResourceUploadInfo