Fix for #27315 for 0.3.5 (seccomp sandbox AT_FDCWD problem) - maint-0.3.5

Jigsaw52requested to merge
Jigsaw52/tor:fix-27315_035 into maint-0.3.5

Github PR: https://github.com/torproject/tor/pull/2012

Edited by Jigsaw52

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