terms: Rename and tweak FIRST_TIME_TERMS_OF_SERVICE_TEMPLATE.

We do s/TOS/TERMS_OF_SERVICE/ on the name, and while we're at it,
remove the assumed zerver/ namespace for the template, which isn't
correct -- Zulip Cloud related content should be in the corporate/
directory.

zerver/tests/test_home.py

@@ -496,7 +496,7 @@ class HomeTest(ZulipTestCase):
         user.tos_version = None
         user.save()
 
-        with self.settings(FIRST_TIME_TOS_TEMPLATE="hello.html"), self.settings(
+        with self.settings(FIRST_TIME_TERMS_OF_SERVICE_TEMPLATE="zerver/hello.html"), self.settings(
             TERMS_OF_SERVICE_VERSION="99.99"
         ):
             result = self.client_post("/accounts/accept_terms/")

zerver/views/home.py

@@ -49,8 +49,11 @@ def accounts_accept_terms(request: HttpRequest) -> HttpResponse:
 
     email = request.user.delivery_email
     special_message_template = None
-    if request.user.tos_version is None and settings.FIRST_TIME_TOS_TEMPLATE is not None:
-        special_message_template = "zerver/" + settings.FIRST_TIME_TOS_TEMPLATE
+    if (
+        request.user.tos_version is None
+        and settings.FIRST_TIME_TERMS_OF_SERVICE_TEMPLATE is not None
+    ):
+        special_message_template = settings.FIRST_TIME_TERMS_OF_SERVICE_TEMPLATE
     return render(
         request,
         "zerver/accounts_accept_terms.html",

zproject/default_settings.py

@@ -360,7 +360,7 @@ REALM_CREATION_LINK_VALIDITY_DAYS = 7
 # Zulip again on the web.
 TERMS_OF_SERVICE_VERSION: Optional[str] = None
 # Template to use when bumping TERMS_OF_SERVICE_VERSION to explain situation.
-FIRST_TIME_TOS_TEMPLATE: Optional[str] = None
+FIRST_TIME_TERMS_OF_SERVICE_TEMPLATE: Optional[str] = None
 
 # Hostname used for Zulip's statsd logging integration.
 STATSD_HOST = ""