Take all of the functions that are specific to Windows or Unix, and create a common set of methods in a new header file, all combined in the src/util/ folder.
The goal of this PR is to break src/util.cpp and src/util.h into the following files:
For Windows:
src/util/platform_windows.hsrc/util/platform_windows.cppFor Mac & Linux:
src/util/platform_posix.hsrc/util/platform_posix.cppIssue Reference: #12697
@glaksmono Thanks for wanting to work on #12697. For future reference, ideally [WIP] PRs should only be opened when some code has been written, and you need help/feedback in regards to code or design decisions. We don't really use them for "claiming" issues to work on, a comment in the relevant issue is enough for that. (they will also consume Travis resources unnecessarily).
9a75d29b6f0d6c4834e451b0fae2200786655a35 change the error result from `PIE` to `DYNAMIC_BASE`. And there are no test for 64-bit, so I made one
self.nodes[0] creates an address which is watch-only-shared with self.nodes[3]. If nodes[0] spends the associated UTXO during any of its sends later, the watchonly test will fail, as nodes[3] now has insufficient funds.
Note that this also adds a new find_vout_for_address function to the test framework.