merge tweaks to ALLOW_REMOTE_USER_AUTH functionality from Erick Rudiak

functions.php

@@ -1682,11 +1682,11 @@
 			$pwd_hash2 = encrypt_password($password, $login);
 
 			if (defined('ALLOW_REMOTE_USER_AUTH') && ALLOW_REMOTE_USER_AUTH 
-					&& $_SERVER["REMOTE_USER"]) {
+					&& $_SERVER["REMOTE_USER"] && $login != "admin") {
 
 				$login = db_escape_string($_SERVER["REMOTE_USER"]);
 
-				$query = "SELECT id,login,access_level
+				$query = "SELECT id,login,access_level,pwd_hash
 	            FROM ttrss_users WHERE
 					login = '$login'";
 

login_form.php

@@ -101,9 +101,11 @@ window.onload = init;
 		<?php } ?>
 		<table>
 			<tr><td align="right"><?php echo __("Login:") ?></td>
-			<td align="right"><input name="login"></td></tr>
+			<td align="right"><input name="login" 
+				value="<?php echo $_SERVER["REMOTE_USER"] ?>"></td></tr>
 			<tr><td align="right"><?php echo __("Password:") ?></td>
-			<td align="right"><input type="password" name="password"></td></tr>
+			<td align="right"><input type="password" name="password"
+				value="<?php echo $_SERVER["REMOTE_USER"] ?>"></td></tr>
 			<?php if (ENABLE_TRANSLATIONS) { ?>
 			<tr><td align="right"><?php echo __("Language:") ?></td>
 			<td align="right">