Reset the ready-file wait counter on each server start

The scripts that wait for a server to publish its ready file declare
counter at file scope and never reset it, so the retry budget is shared
by every server start in the script instead of applying to each one.
Once the early cases have used it up, every later create_port() falls
straight through to "NO ready file ending test", kills a server that was
starting normally, and the client then fails with "port number cannot be
0". Retry loops do not help, since the budget is already spent when they
run.

The failure needs only a build whose server start-up is slow enough to
consume a few tenths of a second each time. It showed up in the FIPS
dev-no-POST kernel-settings-all-pqc-asm job, where the server pays for
the CASTs, the PQC algorithms and the vector-register fallback fuzzer:
psk.test gave up after exactly 20 waits and tls13.test after exactly 51,
both the full script budget rather than a per-case one.

Reset counter where the wait begins, which is what the ocsp-stapling
scripts already do. Reproduced with a wrapper that delays the server by
one second: psk.test then fails on its third case before the change and
passes after it.

scripts/crl-revoked.test

@@ -111,6 +111,7 @@ run_test() {
                              -k ${CERT_DIR}/server-revoked-key.pem &
     server_pid=$!
 
+    counter=0
     while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1
@@ -187,6 +188,7 @@ run_hashdir_test() {
                              -c ${CERT_DIR}/server-revoked-cert.pem \
                              -k ${CERT_DIR}/server-revoked-key.pem &
   server_pid=$!
+  counter=0
   while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1

scripts/openssl.test

@@ -303,6 +303,7 @@ start_wolfssl_server() {
 check_server_ready() {
     # server should be ready, let's make sure
     server_ready=0
+    counter=0
     while [ "$counter" -lt 20 ]; do
         echo -e "waiting for $server_name ready..."
         echo -e Checking | nc -4 -w 1 -z localhost "$server_port"

scripts/pkcallbacks.test

@@ -111,6 +111,7 @@ run_test() {
     timeout -s KILL 2m ./examples/server/server -P -R "$ready_file" -p $pk_port &
     server_pid=$!
 
+    counter=0
     while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1

scripts/psk.test

@@ -33,6 +33,7 @@ ready_file=`pwd`/wolfssl_psk_ready$$
 echo "ready file \"$ready_file\""
 
 create_port() {
+    counter=0
     while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1

scripts/resume.test

@@ -87,6 +87,7 @@ do_test() {
     timeout -s KILL 2m ./examples/server/server -r -R "$ready_file" -p $resume_port &
     server_pid=$!
 
+    counter=0
     while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1

scripts/tls13.test

@@ -48,6 +48,7 @@ client_out_file="$(pwd)/wolfssl_tls13_client_out$$"
 echo "ready file \"$ready_file\""
 
 create_port() {
+    counter=0
     while [ ! -s "$ready_file" ]; do
         if [ "$counter" -gt 50 ]; then
             break

scripts/trusted_peer.test

@@ -57,6 +57,7 @@ wrong_cert=`pwd`/certs/server-revoked-cert.pem
 echo "ready file \"$ready_file\""
 
 create_port() {
+    counter=0
     while [ ! -s "$ready_file" -a "$counter" -lt 20 ]; do
         echo -e "waiting for ready file..."
         sleep 0.1