Move the  TCL_MAJOR_VERSION check to the HasStubSupport function.
Change the signature of TclInitStubs as agreed (hopefully).
Move the Tcl_InitStubs() function to a separate source file, so it will not be included when not needed.
Revert change in tcl.h, in stead define TclInitStubs in tclInt.h. For binary compatibility with older Tcl 8.6 versions.
No functional change in any way.
Move toward version-free stubs library.  Continued WIP.
merge trunk
merge trunk
merge trunk
merge trunk