Revert "Cleanup: updated comments"

This reverts commit 6275f2083415d22a6ce0de55645079cd47e0cc80.
Revert "Cleanup: remove AARCH/ARM_COPY relocation support"

This reverts commit b906e13c55c9fe9b4157ba548534a0230434882b.
Revert "Remove support for non-PIE executables"

This reverts commit 2aebf5429bb1241a3298b5b642d38f73124c2026.