replace hardcoded `matrix.to` with reference to const in matrix-to

for easier changing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/messages/TextualBody.js

@@ -36,6 +36,7 @@ import * as ContextualMenu from '../../structures/ContextualMenu';
 import SettingsStore from "../../../settings/SettingsStore";
 import PushProcessor from 'matrix-js-sdk/lib/pushprocessor';
 import ReplyThread from "../elements/ReplyThread";
+import {host as matrixtoHost} from '../../../matrix-to';
 
 linkifyMatrix(linkify);
 
@@ -304,7 +305,7 @@ module.exports = React.createClass({
             // never preview matrix.to links (if anything we should give a smart
             // preview of the room/user they point to: nobody needs to be reminded
             // what the matrix.to site looks like).
-            if (host == 'matrix.to') return false;
+            if (host === matrixtoHost) return false;
 
             if (node.textContent.toLowerCase().trim().startsWith(host.toLowerCase())) {
                 // it's a "foo.pl" style link

src/matrix-to.js

@@ -14,7 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-export const baseUrl = "https://matrix.to";
+export const host = "matrix.to";
+export const baseUrl = `https://${host}`;
 
 export function makeEventPermalink(roomId, eventId) {
     return `${baseUrl}/#/${roomId}/${eventId}`;