The problem with including <simplicity/elements/env.h> in interpreter.h is that
now everyone who needs to include interpreter.h also needs access to
Simplicity's header files too.

This commit breaks that dependency chain by using forward declarations.  It will
pay signifigant dividends when elements switches to CMake.

…ation

6c7788a Avoid Simplicity header dependency propogation (Russell O'Connor)

Pull request description:

  The problem with including <simplicity/elements/env.h> in interpreter.h is that now everyone who needs to include interpreter.h also needs access to Simplicity's header files too.

  This commit breaks that dependency chain by using forward declarations.  It will pay signifigant dividends when elements switches to CMake.

ACKs for top commit:
  delta1:
    ACK 6c7788a; built and tested locally
  apoelstra:
    ACK 6c7788a; successfully ran local tests

Tree-SHA512: 78d043a094f0a2bb51e0f103313ae568b42ec2852d8fe9a3fbbcad9c0fbf6829ef1347f83bfd361547ec165c01965e7342188a38d8faacfcf90ef70c5b7001f6

…ging PRs

8f28d82 docs: add github-merge.py process for merging PRs (Byron Hambly)

Pull request description:

  Documents how to merge PRs using the github-merge.py script from Bitcoin maintainer tools repo.

ACKs for top commit:
  psgreco:
    ACK 8f28d82

Tree-SHA512: b263dd7715fa71926ceeae053e453a4a19b64fa89c88cb0f84fa15bafbcc1051f35ca4f28a05f41dfc8d3af1d1de9eb2bb6cd832867cf7d7d7772a3c7267777b

…or qr uri

4c79d5a fix: use liquidnetwork or liquidtestnet for uri in elements mode (Byron Hambly)

Pull request description:

  fixes ElementsProject#1529

ACKs for top commit:
  tomt1664:
    ACK 4c79d5a
  psgreco:
    ACK 4c79d5a

Tree-SHA512: 00862c3851bd1663ed17dfde9ef155840d4d735b3e61ad890155dccdc9cb7fb4fc086021a9ae1a1030ff8e809dc6ffb46a5aeed35d3c5625b44f65ec6cdae421