caddy-frontend: Bugfix validate and graceful scripts

Do not emit needless diff into log.

Do not stop processing in case of validation failure.

software/caddy-frontend/buildout.hash.cfg

@@ -102,11 +102,11 @@ md5sum = ebe5d3d19923eb812a40019cb11276d8
 
 [template-graceful-script]
 filename = templates/graceful-script.sh.in
-md5sum = 23fae618a0465b1e6bc46aefa79d9a7e
+md5sum = 31dd34de4c40a1d814bcbef482c757cc
 
 [template-validate-script]
 filename = templates/validate-script.sh.in
-md5sum = 986681fce5f6dcaa1ee5a05bc55a7e4a
+md5sum = 4c80ba3727c397f8d5b12cf1888cf959
 
 [caddyprofiledeps-setup]
 filename = setup.py

software/caddy-frontend/templates/graceful-script.sh.in

@@ -7,7 +7,7 @@ touch $SIGNATURE_FILE
 {{ sha256sum }} {{ path_list }} | sort -k 66 > $NSIGNATURE_FILE
 
 # If no diff, no restart for now
-if diff "$SIGNATURE_FILE" "$NSIGNATURE_FILE"; then
+if diff "$SIGNATURE_FILE" "$NSIGNATURE_FILE" > /dev/null ; then
   echo "Nothing changed, so nothing to reload"
   exit 0
 fi

software/caddy-frontend/templates/validate-script.sh.in

@@ -9,11 +9,14 @@ SIGNATURE_STATUS={{ signature_file }}.status
 touch $SIGNATURE_FILE
 {{ sha256sum }} {{ path_list }} | sort -k 66 > $NSIGNATURE_FILE
 
-if diff "$SIGNATURE_FILE" "$NSIGNATURE_FILE"; then
+if diff "$SIGNATURE_FILE" "$NSIGNATURE_FILE" > /dev/null; then
   rm -f "$NSIGNATURE_FILE"
 else
   mv "$NSIGNATURE_FILE" "$SIGNATURE_FILE"
+  # do not catch errors during validation
+  set +e
   {{ wrapper }} -validate
   echo $? > $SIGNATURE_STATUS
+  set -e
 fi
 exit `cat $SIGNATURE_STATUS`