MS: Update "Add New Site" address description text for accuracy.

Add hyphens to the list of allowed characters and add the `description` class to helper text paragraph tag.

Props thomaswm for the initial patch.
Fixes #26388.

Built from https://develop.svn.wordpress.org/trunk@35893


git-svn-id: http://core.svn.wordpress.org/trunk@35857 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/network/site-new.php

@@ -184,7 +184,7 @@ if ( ! empty( $messages ) ) {
 			<?php } else {
 				echo $current_site->domain . $current_site->path ?><input name="blog[domain]" type="text" class="regular-text" id="site-address" aria-describedby="site-address-desc"  autocapitalize="none" autocorrect="off" />
 			<?php }
-			echo '<p id="site-address-desc">' . __( 'Only lowercase letters (a-z) and numbers are allowed.' ) . '</p>';
+			echo '<p class="description" id="site-address-desc">' . __( 'Only lowercase letters (a-z), numbers, and hyphens are allowed.' ) . '</p>';
 			?>
 			</td>
 		</tr>

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-35892';
+$wp_version = '4.5-alpha-35893';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.