Add bookmark ignore functionality for multiple accounts

```
cat ~/.local/share/profanity/bookmark_ignore
[jubalh@iodoru.org]
profanity@rooms.dismail.de=true

[testuser@domain.org]
testr@rooms.domain.org=true
```

Regards https://github.com/profanity-im/profanity/issues/1115

src/event/server_events.c

@@ -79,6 +79,8 @@ sv_ev_login_account_success(char *account_name, gboolean secured)
 {
     ProfAccount *account = accounts_get_account(account_name);
 
+    bookmark_ignore_on_connect(account->jid);
+
     roster_create();
 
 #ifdef HAVE_LIBOTR