Add "/avatar disable" to comply with point "3.5 Publisher Disables
Avatar Publishing" in XEP-0084.
src/command/cmd_defs.c:2416
Add "disable" argument. Reword the "/avatar" command description
so it flows better.
src/command/cmd_ac.c:1101
Add "disable" to the "/avatar" autocomplete dictionary.
src/command/cmd_funcs.c:9277
Split "/avatar" commands into two groups with an if statement; those
with a parameter and those without. "cons_bad_cmd_usage()" is in both
groups, which is messy. "disable" has similar logic to "set", but it
includes a failure message.
src/xmpp/avatar.c:152
"avatar_publishing_disable()" uses the same logic to publish metadata
as in "avatar_set()".
src/xmpp/avatar.c:238
Add a message to inform users when they do not receive an avatar after
using "/avatar get" and "/avatar open". In case of a failure, the user
will be subscribed to future avatar updates as long as they continue
to use their current instance of profanity. Adding
"caps_remove_feature()" after "cons_show()" will unsubscribe the user
from avatar updates and prevent the user from downloading an avatar
unexpectedly hours later without issuing an "/avatar" command.
src/xmpp/stanza.c:2698
The new "disable" function follows the same logic as
"stanza_create_avatar_metadata_publish_iq()".
in before it just used the input command line as it was but this fixes
this by adding formatting using `format_call_external_argv` which is
already used in `url open` executable.
Use `/avatar set <path>` where <path> is an image file to upload a new
avatar for the current user. When the avatar is too big it gets scaled
down. Scaling code copied from dino.
Fixes https://github.com/profanity-im/profanity/issues/1687
Replace our own stanza_get_child_by_name_and_ns() with the upstreamed
xmpp_stanza_get_child_by_name_and_ns() provided by the new
libstrophe/libmesode 0.10.0.
So far we removed the avatar feature only after a succesful retrive in
avatar_request_item_by_id() before we are going to retrieve the actual
image.
We should remove it at every `/avatar barejid` call too so in case one
retrieval was unsucessful that we can call it again.
So far it seems like there is no other way to trigger getting the nodes
except announcing that we support the avatar feature.
