URL enconding of AID alias name in rest calls

src/keri/app/aiding.ts

@@ -112,7 +112,7 @@ export class Identifier {
      * @returns {Promise<any>} A promise to the identifier information
      */
     async get(name: string): Promise<any> {
-        const path = `/identifiers/${name}`;
+        const path = `/identifiers/${encodeURIComponent(name)}`;
         const data = null;
         const method = 'GET';
         const res = await this.client.fetch(path, method, data);

src/keri/app/clienting.ts

@@ -182,9 +182,7 @@ export class SignifyClient {
         headers.set('Content-Type', 'application/json');
 
         const _body = method == 'GET' ? null : JSON.stringify(data);
-        if (_body !== null) {
-            headers.set('Content-Length', String(_body.length));
-        }
+
         if (this.authn) {
             signed_headers = this.authn.sign(
                 headers,

test/app/aiding.test.ts

@@ -99,6 +99,15 @@ describe('Aiding', () => {
         assert.deepEqual(lastCall.body.salty.transferable, true);
     });
 
+    it('Can create salty identifiers with special characters in the name', async () => {
+        client.fetch.mockResolvedValue(Response.json({}));
+        await client.identifiers().get('a name with ñ!');
+
+        const lastCall = client.getLastMockRequest();
+        assert.equal(lastCall.method, 'GET');
+        assert.equal(lastCall.path, '/identifiers/a%20name%20with%20%C3%B1!');
+    });
+
     it('Can create salty AID with multiple signatures', async () => {
         client.fetch.mockResolvedValue(Response.json({}));