Update bootstrap.php

Add in a more user friendly error that tells the user WHERE the script is looking for the file (in case the base path or other variable is wrong)
Cloudflare IP forwarding when using getCurrentIP()

HTTP_X_FORWARDED_FOR doesn't always work with Cloudflare,
HTTP_CF_CONNECTING_IP however does.

https://support.cloudflare.com/hc/en-us/articles/200170986-How-does-CloudFlare-handle-HTTP-Request-headers-
Merge pull request #1994 from kthxbai2u/patch-1

Update bootstrap.php
Merge pull request #2002 from Contex/development

Cloudflare IP forwarding when using getCurrentIP()
[FIX] getbalance fix for coins with getbalance problems
[FIX] file rights
Merge pull request #2005 from iAmShorty/getbalance-config

[UPDATE] Getbalance config
[SQL] Base Structure 0.0.8
[ADDED] Return-Path when sending mail
Merge pull request #2008 from MPOS/mail-return-path

[ADDED] Return-Path when sending mail