Import v8.5.8
Import v8.5.9
Import v8.5.10
Import v8.5.11
Import v8.5.12
Import v8.5.13
Import v8.5.14
Import v8.5.15
Merge tag 'v8.5.15'

v8.5.15

Conflicts:
	generic/prolog.ps
	macosx/tkMacOSXFont.c
	unix/Makefile.in
	unix/configure
	unix/configure.in
	unix/installManPage
	unix/tcl.m4
	unix/tkUnixRFont.c

Tried to retain the rotation code backported from
tk8.6.x. Configure and Makefile.in changes match
those in tcl8.5.15 merge. Will need to be tested.