Build script improvements

Implement some build script improvements.

changed milestone to %Onionspray 1.7.0

added Onion Services Sponsor 145 labels

requested review from @rhatto

assigned to @rhatto

added 1 commit

• fc6d9921 - Fix: build: add a --keep-sources flag

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added 2 commits

• 9ea2bfa7 - Fix: build: add a --keep-sources flag (2)
• d7f48422 - Fix: build: add a --keep-sources flag (3)

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approved this merge request

mentioned in commit 1feb0de4

merged