Remove references to VFS in the non-English language XML files (already removed from English (en) versions)

First part of change to remove LLVFS from the Viewer. Consists of code changes to remove LLVFS and LLVFSThread classes along with the associated source files. The existing llvfs folder is renamed to llcache. Also includes changes to CMake script in many places to reflect changes. Eventually, llvfile source file and class will be renamed but that is not in this change.

This reverts commit 92499ce1.

# Conflicts:
#	indra/newview/llinventorybridge.cpp
#	indra/newview/llinventorypanel.cpp
#	indra/newview/llinventorypanel.h

This reverts commit bf999f2f due to revert of updater, this will be moved to separate 'epic' instead

Change was moved to DRTVWR-514

Changes were moved to DRTVWR-514

According to UX UI engineer. Also adapted it to new system, but it needs a better solution.

Add code to login-fail handler to provide release notes URL from
SLVersionChecker handshake event.

Scroll hiding was added in SL-3738, but there should be no need to disable it, tab container should be smart enough to know when to hide arrows.