use bash for scripts

misc/scripts/cronjob.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 ./download_segments_diff.sh # downloads diff directory in tmp/diff
 

misc/scripts/download_segments.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 out_dir="../segments4"
 

misc/scripts/download_segments_diff.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 out_dir="../segments4_diff"