Remove debug lines and commented cases

This helps for editing in paredit
Check function depth for parsing object indices

Closes PR 14509
meta/pkg-build: check dependency declarations

Uses `raco setup --check=pkg-deps --pkgs <pkg>`.
meta/pkg-build: first cut at result-summary page

Summary also goes in "summary.rktd", so a different view
can be generated.
refine attempt at debugging output for JIT buffer overflow
pkg-build/thread: fix test
read: fix long-double error reporting

This repair corrects an ocassional test failure in the `read`
test suite.
fix doc typo
games/gobblet: fix game explorer in case of tie

A tie due to a cycle would cause the explorer to fail instead of
giving up with a tie.
meta/pkg-build: extract/salvage docs for conflicting and failed packages

Also, add a step to package results into a web-friendly archive.
meta/pkg-build: fix construction of catalog URL

Also, add a `#:skip-download?` option.
meta/pkg-build: better way to select build steps
Include pkg authors in status web page.
pkg-build: tweak format of summary page
meta/pkg-build: use Etag header to avoid installer download
Post-release version for the v6.1 release
add #:post condition to meta functions
add Burke as an author of Redex
meta/pkg-build: fix step order
raco pkg catalog-archive: handle interrupted update

While `catalog-archive` cannot handle arbitrary corruption of
a previous archive run, it should be able to handle a state
due to interruption or other transient errors.

Merge to v6.1.