[manual] Rename error bot to zulip.com domain.

Just before this is pushed to prod, we need to rename the Humbug error
bot in the database using:

./manage.py change_user_email humbug+errors@humbughq.com error-bot@zulip.com
/etc/init.d/memcached restart

No action is required on pushing this to staging, but in between when
this is pushed to staging and when it is pushed to prod (and that
transition performed), error reporting to humbug will not work on
staging.

(imported from commit 93044bb01797c981067f359676826d4a5791e235)

zephyr/handlers.py

@@ -65,7 +65,7 @@ class AdminHumbugHandler(logging.Handler):
         subject, stack_trace, user_info = format_record(record)
 
         try:
-            internal_send_message("humbug+errors@humbughq.com",
+            internal_send_message("error-bot@zulip.com",
                     "stream", "errors", self.format_subject(subject),
                     "Error generated by %s\n\n~~~~ pytb\n%s\n\n~~~~\n%s" % (
                     user_info, stack_trace, request_repr))

zephyr/lib/bugdown/__init__.py

@@ -688,7 +688,7 @@ def do_convert(md, realm_domain=None, message=None):
         logging.getLogger('').error('Exception in Markdown parser: %sInput (sanitized) was: %s'
             % (traceback.format_exc(), cleaned))
         subject = "Markdown parser failure on %s" % (platform.node(),)
-        internal_send_message("humbug+errors@humbughq.com", "stream",
+        internal_send_message("error-bot@zulip.com", "stream",
                 "errors", subject, "Markdown parser failed, email sent with details.")
         mail.mail_admins(subject, "Failed message: %s\n\n%s\n\n" % (
                                     cleaned, traceback.format_exc()),

zephyr/lib/html_diff.py

@@ -106,7 +106,7 @@ def highlight_html_differences(s1, s2):
         logging.getLogger('').error('HTML diff produced mal-formed HTML')
 
         subject = "HTML diff failure on %s" % (platform.node(),)
-        internal_send_message("humbug+errors@humbughq.com", "stream",
+        internal_send_message("error-bot@zulip.com", "stream",
                               "errors", subject, "HTML diff produced malformed HTML")
         return s2
 

zephyr/management/commands/populate_db.py

@@ -194,7 +194,7 @@ class Command(BaseCommand):
             # are needed for the test suite.
             hardcoded_humbug_users_nosubs = [
                 ("Zulip New User Bot", "humbug+signups@humbughq.com"),
-                ("Zulip Error Bot", "humbug+errors@humbughq.com"),
+                ("Zulip Error Bot", "error-bot@zulip.com"),
                 ("Zulip Notification Bot", "humbug+notifications@humbughq.com"),
                 ("Zulip Tutorial Bot", "tutorial-bot@zulip.com"),
                 ]