Legally incredibly dubious, particularly since we don't follow it
strictly as policy, and we have git history instead, which does it right.
This is just a waste of time and a cargo cult.

Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>

1. Wait for the start callback rather than the do block, as it happens
   later. This prevents us from getting into many conditions where the
   start returns before the server is fully initialized, where if stop()
   is called too soon after start returns, it would cause exceptions.
2. Wait for the thread to finish completely
3. Use Thread.current.abort_on_exception` to show the actual listen errors,
   so that problems like this can be diagnosed.
4. Use :each to start and stop TinyServer so that race conditions like this
   are exposed earlier and more often (this will let us rid ourselves of them
   more quickly).
5. Use WEBrick::HTTPServer directly, which gets rid of the need for the
   complicated trap workaround (rack is the one that traps).

4174 Style/SpaceInsideHashLiteralBraces
1860 Style/SpaceAroundOperators
1336 Style/SpaceInsideBlockBraces
1292 Style/AlignHash
 997 Style/SpaceAfterComma
 860 Style/SpaceAroundEqualsInParameterDefault
 310 Style/EmptyLines
 294 Style/IndentationConsistency
 267 Style/TrailingWhitespace
 238 Style/ExtraSpacing
 212 Style/SpaceBeforeBlockBraces
 166 Style/MultilineOperationIndentation
 144 Style/TrailingBlankLines
 120 Style/EmptyLineBetweenDefs
 101 Style/IndentationWidth
  82 Style/SpaceAroundBlockParameters
  40 Style/EmptyLinesAroundMethodBody
  29 Style/EmptyLinesAroundAccessModifier
   1 Style/RescueEnsureAlignment

Generated via git ls-files | xargs perl -pi -e "s/(Author.*?<[^@]+@)(?:opscode\\.com|getchef\\.com)(>)/\\1chef.io\\2/gi"

Created via git ls-files | xargs perl -pi -e "s/(Copyright.*?), Opscode(,)? Inc(\.)?/\\1, Chef Software Inc./gi"

Generated via git ls-files | xargs perl -pi -e "s/[Cc]opyright (?:\([Cc]\) )?((?\!$(date +%Y))\\d{4})(-\\d{4})?([, ][ \d]+)*(,|(?= ))/Copyright \\1-$(date +%Y),/g"

This is an entirely mechanically generated (chefstyle -a) change, to go
along with chef/chefstyle#5 . We should pick something and use it
consistently, and my opinion is that double quotes are the appropriate
thing.

In the process, stop auto-expanding JSON in the HTTP client, and let
individual classes control that themselves.

Fixes #2737, Fixes #3518