My local settings for Drupal sites

local.settings.php

<?php
/**
 * @file
 * local.settings.php (Drupal 6.x)
 *
 * This settings file is intended to contain settings specific to a local
 * development environment, by overriding options set in settings.php.
 *
 * Include this file from your regular settings.php by including this at the
 * bottom:
 *
 *   @include('local.settings.php');
 *
 * Placing this at the very end of settings.php will allow you override all
 * options that are set there. Prefixing it with the @ suppresses warnings if
 * the local.settings.php file is missing, so you can commit this to your repo.
 */

// Toggle the use of memcache.
$_use_memcache = FALSE;

// Toggle the output of devel debugging/logging.
$_use_devel = FALSE;

// Path where all contrib modules can be found.
$_contrib_path = 'sites/all/modules/contrib';

// The name of the database. This will also be used as the memcache prefix.
$_db_name = 'dbname';

// Database configuration.
if (is_array($db_url)) {
  $db_url['default'] = 'mysqli://root:root@debianvm/' . $_db_name;
}
else {
  $db_url = 'mysqli://root:root@debianvm/' . $_db_name;
}

// Allow anyone to run update.php.
$update_free_access = FALSE;

// Set error reporting level to ignore notices and deprecated warnings. These
// should be turned back on during development to clean up any code that
// generates them.
error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);

// Note that these options can also be moved into index.php, so that errors
// that occur before settings.php will also be reported.
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

// Fix for fast_404 module under lighttpd.
$_SERVER['QUERY_STRING'] = preg_replace('/&$/i', '', $_SERVER['QUERY_STRING']);

// Prep the $conf array.
if (!is_array($conf)) {
  $conf = array();
}

// Save email messages to the log instead of sending them out. This is to
// prevent accidental email sends from a development site.
// Make sure you adjust this value if the Devel module is located elsewhere
$_smtp_library = $_contrib_path . '/devel/devel.module';
if (is_file($_smtp_library)) {
  $conf['smtp_library'] = $_smtp_library;
}

// Disable Secure Pages and Secure Site module functionality
$conf['securepages_enable'] = 0;
$conf['securesite_enabled'] = 0;

// Use a test payment gateway to prevent real transactions
$conf['uc_payment_credit_gateway'] = 'test_gateway';

// Lower the search indexing per cron run to prevent long cron runs
$conf['search_cron_limit'] = 5;

// Reverse proxy
$conf['reverse_proxy'] = TRUE;
$conf['reverse_proxy_addresses'] = array('127.0.0.1');

// Disable preprocessing of CSS and JS.
$conf['preprocess_css'] = 0;
$conf['preprocess_js'] = 0;

// Use environment indicator, if available.
$conf['environment_indicator_enabled'] = TRUE;
$conf['environment_indicator_text'] = 'LOCAL DEVELOPMENT';
$conf['environment_indicator_color'] = 'dark-red';

// Use memcache if available & enabled.
$_memcache_inc = $_contrib_path . '/memcache/memcache.inc';
if ($_use_memcache && is_file($_memcache_inc)) {
  // Configure memcache locally
  $conf['memcache_servers'] = array(
    'debianvm:11211' => 'default',
  );
  $conf['memcache_bins'] = array(
    'cache' => 'default',
  );
  $conf['memcache_key_prefix'] = $_db_name;
  $conf['cache_inc'] = $_memcache_inc;
}
else {
  // Revert to Drupal core caching in case settings.php
  // is configured to use Memcache.
  $conf['cache_inc'] = 'includes/cache.inc';
}

// Devel settings
if ($_use_devel) {
  $conf['dev_query'] = 1;
  $conf['devel_query_display'] = 1;
  $conf['devel_query_sort'] = 0;
  $conf['devel_execution'] = 5;
  $conf['devel_store_queries'] = 0;
  $conf['devel_store_random'] = 1;
  $conf['devel_redirect_page'] = 0;

  // Enable xhprof profiling of each page request.
  $conf['devel_xhprof_enabled'] = 0;
  $conf['devel_xhprof_directory'] =  "/var/www/xhprof";
  $conf['devel_xhprof_url'] =  "http://debianvm/xhprof/xhprof_html";
}