- TCL_PACKAGE_PATH now needs to be a unix-style path separated by
colons rather than a Tcl list.

- Version 8.6.15:
* [d63061] remove private unicode 0xE000-0xF8FF from unicode
control group
* [1b8a89] TCL_PACKAGE_PATH in tclConfig.sh change from TCL list
to ":" separated items
*** POTENTIAL INCOMPATIBILITY ***
* [1acd17] fix compiled mapped ensembles
* [f23022] fix encoding koi8-u codepoint 0xB4
* [6811a0] speedup op unicode transformation related operations
* Add encodings: koi8-ru, koi8-t
* [7cb740] Fix Tcl_ParseArgsObjv with TCL_ARGV_GENFUNC option
* Hash speedup for pointer compare. Option
TCL_HASH_KEY_DIRECT_COMPARE for hash tables
* [TIP 692] Deprecate Tcl_GetAlias()
* [a5f4a7] Correct tcl::tm::path autoload
* [3c26de] Remove empty all items from tclConfig.sh path
variables.
* [87271f] Fix crash in oo+coroutine
* [7842f3] fix crash in oo destructors in same namespace
* [79474c] Fix crash in reflected channels
* [c6897e] Fix crash due to unchecked file descriptor size
* [3fc328] Fix report of non ASCII computer names on Windows
* [e3f4a8] Fix error message caused by interp limit
* [1d26e5] Source files with BOM also in safe interpreters
* [5fca83] Fix encoding system result for system locale
ISO-8859-1
* [0de6c1] Fix crash in [child invokehidden info frame]