NUT shell scripts: use a better portable shebang for bash interpreter…

… discovery

NOTE: Some scripts require BASH syntax; maybe not all of them do (did not revise at this time)

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

indent.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Filter NUT C source file style to conform to recommendations of
 # https://www.networkupstools.org/docs/developer-guide.chunked/ar01s03.html#_coding_style

scripts/HP-UX/makedepot.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -x
 

scripts/Windows/build-mingw-nut.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # NOTE: bash syntax (non-POSIX script) is used below!
 #

scripts/installer/make_package.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #	make_package.sh
 #	Copyright (c) 2013-2015, by Eaton (R) Corporation. All rights reserved.

scripts/subdriver/gen-snmp-subdriver.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # an auxiliary script to produce a "stub" snmp-ups subdriver from
 # SNMP data from a real agent or from dump files

scripts/subdriver/gen-usbhid-subdriver.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # an auxiliary script to produce a "stub" usbhid-ups subdriver from
 # the output of