Merge branch 'v8'

Release version 8.1

Add a e2e test for a raw NAMES command

Handle the NAMES message for an already-joined or non-existing channel

If a user manually does a NAMES query, the result were interpreted as a user
list, which is wrong. And with the special * argument, this would even cause
a crash.

Fix #3357

Improve the forward_server_message to concatenate everything

Empty the <command/> nodes before reusing them in our responses

fix #3356

Also handle SIGHUP to reload the configuration

Because that’s what is typically done on other deamons, and we don’t want to
suprise users.

Start version 9.0

Release version 8.0

Add a changelog entry for gcc 5.0

Add a missing changelog entry

Add signature_methods=IMPLICIT for ppirc and gimp.org servers

fix #3351

See https://github.com/randombit/botan/issues/1558

Add a test for the <max>0</max> MAM query

mam: Send “fin complete” only when appropriate

Also simplify how we did the whole “limit + 1”
And fix one bad interpretation of the XEP for the case where the query has
no after or before restriction.

fix #3349

Next version will just be 8.0, not 7.3

Missing fields in a data-form response are now interpreted as an empty value

Merge branch 'v7'

Fix a crash when botan policy does not allow any available ciphersuite

Fix the test_suite by using catch’s single_include directory

Only use the ID to order archives

fix #3343