buffet: added url_utils

Added a bunch of utility functions to manipulate URLs. Stuff like
combining URLs, adding and extracting query parameters and so on.

BUG=None
TEST=New and old unit tests pass.

Change-Id: Ie8c76b611f9d985dc24aae22caf60cd22aac96a8
Reviewed-on: https://chromium-review.googlesource.com/195629
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
6 files changed
tree: 0d9d57909de4b8508099b1089a35a255cec56a54
  1. attestation/
  2. buffet/
  3. common-mk/
  4. .gitignore
  5. LICENSE