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automake 1.12 changed the default for tests, requiring projects
that need serial test execution to add an option for setting this.
This option isn't available on automake 1.11, so those projects
became incompatible with automake 1.11 once they got ready for 1.12.
This obviously isn't an issue in most cases where the prebuilt
configure is good enough.

Since we don't run the tests in contribs, just remove this option
for now, to allow building with both automake 1.11 and 1.12.
Signed-off-by: Martin Storsjö <martin@martin.st>

Those Windows functions bring no benefit and are forbidden in Windows Store apps

CVE-2011-3048 (serious vulnerability)

See CVE-2011-2690 (we shouldn't be affected), CVE-2011-2691 (same),
CVE-2011-2692 (no idea)

'make fetch' has to fetch sources for all the built packages,
including dependency packages. Conversely, 'make fetch' should not
fetch sources of distro-provided packages, not even dependencies.
This should fix that.

As an minor bonus, 'make .foo' should now work even if foo is
provided by the distro, and conditional build rules should be cleaner.

Remove the old way with using the static makefiles and weird ??PREFIX?? patches