Clarify that archived mailing lists are valid for discussion. Fixes #460
Clarify that archived mailing lists are valid for discussion. Fixes #460

  The "discussion" criterion currently says that
  "The project MUST have one or more mechanisms
  for discussion (including proposed changes and issues) that are
  searchable, allow messages and topics to be addressed by URL,
  enable new people to participate in some of the discussions, and
  do not require client-side installation of proprietary software."

  This change clarifies that archived mailing lists(s) are also fine
  by specifically mentioning them.  They're a common mechanism, so
  it's worth specifically noting that.

  Credits to Josh Berkus for noticing this omission.

Signed-off-by: David A. Wheeler <9ae72d22d8b894b865a7a496af4fab6320e6abb2@dwheeler.com>

jdossett/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,wanganyv/cii-best-practices-badge,dwvisser/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,coreinfrastructure/best-practices-badge,coreinfrastructure/best-practices-badge,taylorcoursey/cii-best-practices-badge,jdossett/cii-best-practices-badge,dwvisser/cii-best-practices-badge,wanganyv/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,dwvisser/cii-best-practices-badge,wanganyv/cii-best-practices-badge,jdossett/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,dwvisser/cii-best-practices-badge,jdossett/cii-best-practices-badge,coreinfrastructure/best-practices-badge,wanganyv/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,taylorcoursey/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,coreinfrastructure/best-practices-badge,taylorcoursey/cii-best-practices-badge,taylorcoursey/cii-best-practices-badge