increased file max upload size

roundcube/roundcubemail-1.3.6/.htaccess

 php_flag    log_errors      On
 # php_value    error_log    logs/errors
 
-php_value   upload_max_filesize   5M
-php_value   post_max_size         6M
+php_value   upload_max_filesize   50M
+php_value   post_max_size         51M
 php_value   memory_limit          64M
 
 php_flag    zlib.output_compression     Off