tinyxml2: update to version 2.2.0
refactoring: use :: to indicate global system functions
fix PVS warning: It is incorrect to compare the variable of BOOL type with TRUE. Correct expression is: 'PathIsRelativeW(Result.c_str()) != FALSE'
remove unneeded check
fix PVS warning: It is incorrect to compare the variable of BOOL type with TRUE
refactoring: rename parameter
fix code style
fix code style
add comments
refactoring: TRegistryStorage::GetFailed() const
WebDAVFileSystem.cpp: use ApiPath()
WinSCPDialogs.cpp: minor improvements
CoreDefs.hpp: fix code style
refactoring: DirName --> ADirName
refactoring: File --> AFile
refactoring: init local vars
refactoring: ++Index
refactoring: TFTPFileSystem::PostMessage --> TFTPFileSystem::FTPPostMessage
refactoring: use :: to indicate global system functions
Merge branch 'master' into far3

* master:
  refactoring: use :: to indicate global system functions
  refactoring: TFTPFileSystem::PostMessage --> TFTPFileSystem::FTPPostMessage
  refactoring: ++Index
  refactoring: init local vars
  refactoring: File --> AFile
  refactoring: DirName --> ADirName
  CoreDefs.hpp: fix code style
  WinSCPDialogs.cpp: minor improvements
  WebDAVFileSystem.cpp: use ApiPath()
  refactoring: TRegistryStorage::GetFailed() const
  add comments
  fix code style
  fix code style
  refactoring: rename parameter
  fix PVS warning: It is incorrect to compare the variable of BOOL type with TRUE
  remove unneeded check
  fix PVS warning: It is incorrect to compare the variable of BOOL type with TRUE. Correct expression is: 'PathIsRelativeW(Result.c_str()) != FALSE'
  refactoring: use :: to indicate global system functions
  tinyxml2: update to version 2.2.0