Properly handle leading @ in search (Fix #79)

Enhance documentation to talk about server.name in DNS override for auth

docs/features/authentication.md

@@ -148,7 +148,8 @@ dns.overwrite.homeserver.client:
     value: 'http://localhost:8008'
 ```
 `name` must be the hostname of the URL that clients use when connecting to the Homeserver.
-In case the hostname is the same as your Matrix domain, you can use `${matrix.domain}` to auto-populate the `value`
-using the `matrix.domain` configuration option and avoid duplicating it.
+You can use `${server.name}` to auto-populate the `value` using the `server.name` configuration option and avoid duplicating it.
+In case the hostname is the same as your Matrix domain and `server.name` is not explicitely set in the config, `server.name` will default to
+`matrix.domain` and will still probably have the correct value.
 
 `value` is the base internal URL of the Homeserver, without any `/_matrix/..` or trailing `/`.

docs/features/directory.md

@@ -138,5 +138,5 @@ the `matrix.domain` configuration option and avoid duplicating it.
 You can configure if the Homeserver should be queried at all when doing a directory search.  
 To disable Homeserver results, set the following in mxisd configuration file:
 ```yaml
-directory.exclude.homeserever: true
+directory.exclude.homeserver: true
 ```

src/main/java/io/kamax/mxisd/directory/DirectoryManager.java

@@ -75,6 +75,10 @@ public class DirectoryManager {
     }
 
     public UserDirectorySearchResult search(URI target, String accessToken, String query) {
+        if (StringUtils.startsWith(query, "@")) {
+            query = query.substring(1);
+        }
+
         log.info("Performing search for '{}'", query);
         log.info("Original request URL: {}", target);
         UserDirectorySearchResult result = new UserDirectorySearchResult();