Hide private IPs from account activity for non-admins.

mobile-web keeps cropping up with a bug that puts private IPs into
the account history for users. Best not to worry them with such
things and hide it from their activity page.

r2/r2/lib/pages/pages.py

@@ -24,6 +24,7 @@
 from collections import Counter, OrderedDict
 
 from r2.config import feature
+from r2.lib.contrib.ipaddress import ip_address
 from r2.lib.db.operators import asc
 from r2.lib.wrapped import Wrapped, Templated, CachedTemplate
 from r2.models import (
@@ -4876,6 +4877,13 @@ class UserIPHistory(Templated):
     def __init__(self):
         self.my_apps = OAuth2Client._by_user_grouped(c.user)
         self.ips = ips_by_account_id(c.user._id)
+
+        if not c.user_is_admin:
+            self.ips = [
+                ip
+                for ip in self.ips
+                if not ip_address(ip[0]).is_private
+            ]
         super(UserIPHistory, self).__init__()
 
 class ApiHelp(Templated):

r2/r2/lib/strings.py

@@ -153,7 +153,7 @@
     gold_summary_gilding_page_link = _("You're about to give *%(recipient)s* a month of [reddit gold](/gold/about) for this submission:"),
     gold_summary_gilding_page_footer = _("You'll pay a total of %(price)s for this."),
     unvotable_message = _("sorry, this has been archived and can no longer be voted on"),
-    account_activity_blurb = _("This page shows a history of recent activity on your account. If you notice unusual activity, you should change your password immediately. Location information is guessed from your computer's IP address and may be wildly wrong, especially for visits from mobile devices. Note: due to a bug, private-use addresses (starting with 10.) sometimes show up erroneously in this list after regular use of the site."),
+    account_activity_blurb = _("This page shows a history of recent activity on your account. If you notice unusual activity, you should change your password immediately. Location information is guessed from your computer's IP address and may be wildly wrong, especially for visits from mobile devices."),
     your_current_ip_is = _("You are currently accessing reddit from this IP address: %(address)s."),
     account_activity_apps_blurb = _("""
 These apps are authorized to access your account. Signing out of all sessions