[social] indieauth use "domain", not "instance"

components/SocialConnection.vue

@@ -15,7 +15,7 @@
                       :action="providerOptions.redirectViaHome ? `${homeUrl}/api/user/social-redirect/${provider}/${config.locale}` : `/api/connect/${provider}`"
                       class="input-group input-group-sm">
                     <input type="text" name="instance" class="form-control" autofocus required
-                           :placeholder="$t('user.login.instancePlaceholder')"/>
+                           :placeholder="$t(providerOptions.domain ? 'user.login.domainPlaceholder' : 'user.login.instancePlaceholder')"/>
                     <button type="submit" class="btn btn-outline-secondary">
                         <Icon v="link"/>
                     </button>

components/SocialLogin.vue

@@ -6,7 +6,7 @@
         <form :action="link"
               v-if="options.instanceRequired" class="input-group my-2">
             <input type="text" name="instance" class="form-control" autofocus required ref="instance"
-                   :placeholder="$t('user.login.instancePlaceholder')">
+                   :placeholder="$t(options.domain ? 'user.login.domainPlaceholder' : 'user.login.instancePlaceholder')"/>
             <button type="submit" class="btn btn-outline-primary">
                 <Icon v="arrow-right"/>
             </button>

src/socialProviders.js

@@ -8,6 +8,7 @@ export const socialProviders = {
     indieauth: {
         name: 'IndieAuth',
         instanceRequired: true,
+        domain: true,
         icon: 'indieauth.png',
         iconMargin: true,
         avatars: false,