Use env in bash scripting shebangs

helper_scripts/gentoo_setup.sh

-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2009, Scott Barr <gsbarr@gmail.com>
 # All rights reserved.
 #

helper_scripts/pdns-slave-zone-cleanup.sh

-#!/bin/bash
+#!/usr/bin/env bash
 #### Config ################################
 
 DBHOST="localhost"

helper_scripts/utils.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 #  this is a bash script library to be called by other scripts, 
 #  but not to be run directly

remoting_client/cli/ispconfig-cli

-#!/bin/bash
+#!/usr/bin/env bash
 
 # Command line for ISPConfig remote user REST API using either smart functions or raw methods.
 # Author: Johan Ehnberg, johan@molnix.com

remoting_client/examples/rest_example.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 

server/cron.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin
 

server/scripts/create_daily_nginx_access_logs.sh

-#!/bin/bash
+#!/usr/bin/env bash
 PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin
 FILES=/var/log/ispconfig/httpd/*
 for f in $FILES

server/scripts/create_jailkit_chroot.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 # Create the jailkit chroot
 

server/scripts/create_jailkit_programs.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 # Add specified programs and their libraries to the jailkit chroot
 

server/scripts/create_jailkit_user.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 # Add user to the jailkit chroot
 

server/scripts/ispconfig_update.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 _UPD=1
 

server/scripts/run-getmail.sh

-#!/bin/bash
+#!/usr/bin/env bash
 PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin
 set -e
 cd /etc/getmail

server/scripts/update_from_dev.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 {
     umask 0077 \

server/scripts/update_from_dev_stable.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 {
     umask 0077 \

server/scripts/update_from_svn.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 CUR=`dirname $0`
 bash ${CUR}/update_from_dev.sh

server/scripts/update_stable.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 _UPD=1
 

server/server.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 
 PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin