In-Reply-To is not initially present (Closes: 568295)
+ upstream/547980-smime_keys-chaining.patch: support certificate chaining in
smime_keys (Closes: 547980, 549006)
+ + upstream/528233-readonly-open.patch: open attachments in read-only
+ (Closes: 528233)
+ debian-specific/Muttrc: set time_inc to be 250ms (Closes: 537746)
* debian/control:
+ bumping Standards-Version to 3.8.4, nothing to be done