Update docs to refer to forks, in case things break
Enable runtimeerror to email notify "this authenticated user" regarding created/reopened issue
- useful if "this authenticated user" is not a separate "bot github account"
- PENDING: if email reply reaches runtimeerror.js again, it should be routed to github as a comment
Added extract_repo_number_provider_secret
Look for "References" header and parse as "comment on issue" if possible; otherwise fallback to default behavior: treat email as a crash report (create/reopen issue)