Various bits of cleanup, efficiencies, and comment documentation in tclVar.c
proposed fix for Bug 3598300
Backported [Bug 2882342]: correct struct _REPARSE_DATA_BUFFER  in tcl 8.4
merge-mark
testing a cheaper(?) INST_START_COMMAND
Test for Bug 1884496 (not buggy on trunk).
fix for consecutive ISC (produced by [while 1 {...})
better comments
merge trunk
even better ... or so I hope: also inlining INST_PUSH1 in the peephole, checking for ISC after LOAD1 and PUSH1
discouraging the compiler from re-reading *pc in the peephole loop
discouraging the compiler from re-reading *pc in the peephole loop, part2 (any diff?)
Put back TclBackgroundException in internal stub table, so extensions using this, compiled against 8.5 headers still run in Tcl 8.6.
If TCL_NO_DEPRECATED is defined, make sure that TIP #139 functions all are taken from the public stub table, even if the inclusion is through tclInt.h.
If TCL_NO_DEPRECATED is defined, make sure that TIP #139 functions all are taken from the public stub table, even if the inclusion is through tclInt.h.
Clarify readable fileevent "false positives" in	the case of multibyte encodings/transforms [Bug 3436609].
Various bits of cleanup, efficiencies, and comment documentation in tclVar.c
Various bits of cleanup, efficiencies, and comment documentation in tclVar.c (from mig-review)
Put back Tcl_[GS]etStartupScript in internal stub table, so extensions using this, compiled against 8.5 headers still run in Tcl 8.6.
forgot two #undef's