fixes test scripts to avoid bash-isms

certs/ocsp/ocspd0.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22220 -nmin 1                \
     -index   certs/ocsp/index0.txt              \

certs/ocsp/ocspd1.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22221 -nmin 1                  \
     -index   certs/ocsp/index1.txt                \

certs/ocsp/ocspd2.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22222 -nmin 1                  \
     -index   certs/ocsp/index2.txt                \

certs/ocsp/ocspd3.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22223 -nmin 1                  \
     -index   certs/ocsp/index3.txt                \

certs/ocsp/renewcerts.sh

@@ -1,3 +1,5 @@
+#!/bin/sh
+
 openssl req                \
     -new                   \
     -key  root-ca-key.pem  \