But, I think that the user who hasn't an apache account can't create
an issue in JIRA.
I don't think that is true, is it? I think it is role-based:
https://cwiki.apache.org/confluence/display/INFRA/Role+Based+JIRA+Authorization
It looks like any registered user (even non-committers) can create and
link issues, add comments to issues, add attachments to issues. Looks
like it would work fine.
If Jira is linked to github issues, then users could create issues via
github and the PPMC could track everything in Jira.
