pidgin/pidgin

Replace the account-actions-changed signal with an actions-changed signal on PurpleProtocolActions

We also propagate the PurpleProtocolActions::actions-changed signal from the
PurpleProtocolManager::account-actions-changed signal if the protocol implements
the PurpleProtocolActions interface.

Testing Done:
Build the docs and ran the unit tests.

I also put a temporary action in the demo protocol plugin and called `purple_protocol_actions_changed` after the demo protocol connected. I will have another pull request that makes this a permenent action, but I want to convert the demo protocol plugin to subclass PurpleConnection before doing so as that will be accounting of everything *much* easier.

Reviewed at https://reviews.imfreedom.org/r/2168/
/*
* Pidgin - Internet Messenger
* Copyright (C) Pidgin Developers <devel@pidgin.im>
*
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*
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* (at your option) any later version.
*
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#if !defined(PIDGIN_GLOBAL_HEADER_INSIDE) && !defined(PIDGIN_COMPILATION)
# error "only <pidgin.h> may be included directly"
#endif
#ifndef PIDGIN_PRIVATE_H
#define PIDGIN_PRIVATE_H
#include <glib.h>
#include <purple.h>
G_BEGIN_DECLS
/*
* pidgin_commands_init:
*
* Initializes the default conversation commands for Pidgin.
*
* This should only be called internally from Pidgin.
*
* Since: 3.0.0
*/
void pidgin_commands_init(void);
/*
* pidgin_commands_uninit:
*
* Uninitializes the default conversation commands for Pidgin.
*
* This should only be called internally from Pidgin.
*
* Since: 3.0.0
*/
void pidgin_commands_uninit(void);
G_END_DECLS
#endif /* PIDGIN_PRIVATE_H */