Per thread signal masks

Shared procedures

Shared extensions

Scriptless threads; equivalent to
	thread create {while {1} {eval [thread nextmsg]}}

Synchronous inter-thread calls.  Something equivalent to Tk's send.

Access to the stack of a running thread, for debugging

Ability to get thread-id by name

Re-work TclRobots to use MTtcl

Make some of the Tcl library functions MT-Safe.  Likely candidates
are: Tcl_CreateCommand, Tcl_DeleteCommand, Tcl_GetCommandInfo,
Tcl_SetCommandInfo, Tcl_SetVar, Tcl_SetVar2, Tcl_GetVar, Tcl_GetVar2,
Tcl_UnsetVar, Tcl_UnsetVar2

Supply more examples

Use client data instead of thread local data

Build on Solaris 2.4

Build on Solaris x86

Write more on using Tcl threads with other extensions

Port to Tcl 7.4 when available

Distribute MT-sturdy Tcl as patches to Tcl 7.3 and 7.4

