hostLowerは廃止してhostにlowerしたものを入れるように

src/server/api/common/get-host-lower.ts

@@ -1,5 +1,5 @@
 import { toUnicode } from 'punycode';
 
 export default host => {
-	return toUnicode(host).replace(/[A-Z]+/, match => match.toLowerCase());
+	return toUnicode(host).toLowerCase();
 };

src/server/api/endpoints/users/notes.ts

@@ -65,7 +65,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	const q = userId !== undefined
 		? { _id: userId }
-		: { usernameLower: username.toLowerCase(), hostLower: getHostLower(host) } ;
+		: { usernameLower: username.toLowerCase(), host: getHostLower(host) } ;
 
 	// Lookup user
 	const user = await User.findOne(q, {

src/server/api/private/signup.ts

@@ -118,7 +118,6 @@ export default async (ctx: Koa.Context) => {
 		username: username,
 		usernameLower: username.toLowerCase(),
 		host: null,
-		hostLower: null,
 		keypair: generateKeypair(),
 		token: secret,
 		email: null,