Clarify maintenance of auto-instr repos (open-telemetry#57)

* Clarify maintenance of auto-instr repos

* Make the implicit explicit per PR comment

text/0001-telemetry-without-manual-instrumentation.md

@@ -91,7 +91,7 @@ There are some languages that will have OpenTelemetry support before they have D
 
 ### Governance of the auto-instrumentation libraries
 
-The maintainers for each language `foo` will retain their Approver/Maintainer status and privileges for the `auto-instr-foo` repositories.
+Each `auto-instr-foo` repository must have at least one [Maintainer](https://github.com/open-telemetry/community/blob/master/community-membership.md#maintainer) in common with the main `opentelemetry-foo` language repository. There are no other requirements or constraints about the set of maintainers/approvers for the main language repository and the respective auto-instrumentation repository; in particular, there may be maintainers/approvers of the main language repository that are not maintainers/approvers for the auto-instrumentation repository, and vice versa.
 
 ### Mini-FAQ about this proposal