Improve the syslog output for the IANA review email script, also

handle error cases more graceful
 - Legacy-Id: 4880

Author: OleLaursen

ietf/bin/iana-review-email

@@ -15,13 +15,19 @@ management.setup_environ(settings)
 syslog.openlog(os.path.basename(__file__), syslog.LOG_PID, syslog.LOG_LOCAL0)
 
 from ietf.sync.iana import *
+from ietf.doc.models import Document
 
 msg = sys.stdin.read()
 
-syslog.syslog("Reading IANA review email")
-
 doc_name, review_time, by, comment = parse_review_email(msg)
-add_review_comment(doc_name, review_time, by, comment)
+
+syslog.syslog(u"Read IANA review email for %s at %s by %s" % (doc_name, review_time, by))
 
 if by.name == "(System)":
     syslog.syslog("WARNING: person responsible for email does not have a IANA role")
+
+try:
+    add_review_comment(doc_name, review_time, by, comment)
+except Document.DoesNotExist:
+    syslog.syslog("ERROR: unknown document %s" % doc_name)
+