Remove build lock to Tcl 8.5; not needed and some people might want to build against 8.6. Add recommended "-DSQLITE_DQS=0" build flag, https://sqlite.org/quirks.html#dblquote.
Remove build lock to Tcl 8.5; not needed and some people might want to build against 8.6. Add recommended "-DSQLITE_DQS=0" build flag, https://sqlite.org/quirks.html#dblquote.