Bump to 8.5.15 for release.
changes
fix date
some missed changes
Favor timeline over ChangeLog
merge 8.5. update changes.
merge 8.5; update changes
Added note to ChangeLog pointing to the fossil timeline for better logging.
merge release
[3487626] Backport fix for knownBug test dict-23.2.
Stop segfault due to OBOE in CompileWord() calls in [dict lappend] compiler.
Stop segfault due to OBOE in CompileWord() calls in [dict lappend] compiler.