Clean up some old "www.phabricator.com" references

Summary: We've decomissioned this host.

Test Plan: `git grep www.phabricator.com`

Reviewers: chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D13585

scripts/install/install_rhel-derivs.sh

@@ -142,4 +142,4 @@ echo
 echo
 echo "Install probably worked mostly correctly. Continue with the 'Configuration Guide':";
 echo
-echo "    http://www.phabricator.com/docs/phabricator/article/Configuration_Guide.html";
+echo "    https://secure.phabricator.com/book/phabricator/article/configuration_guide/";

scripts/install/install_ubuntu.sh

@@ -87,6 +87,6 @@ echo
 echo
 echo "Install probably worked mostly correctly. Continue with the 'Configuration Guide':";
 echo
-echo "    http://www.phabricator.com/docs/phabricator/article/Configuration_Guide.html";
+echo "    https://secure.phabricator.com/book/phabricator/article/configuration_guide/";
 echo
 echo "You can delete any php5-* stuff that's left over in this directory if you want.";

src/docs/contributor/bug_reports.diviner

@@ -56,12 +56,8 @@ be able to resolve it more easily if you file a report based on HEAD. (For
 example, an old stack trace may not have the right line numbers, which will
 make it more difficult for us to figure out what's going wrong.)
 
-To update Phabricator, use a script like this one:
-
-http://www.phabricator.com/rsrc/install/update_phabricator.sh
-
-This script will require some adjustments depending on how your setup is
-configured, which webserver you are using, etc.
+To update Phabricator, use a script like the one described in
+@{article:Upgrading Phabricator}.
 
 **If you can not update** for some reason, please include the version of
 Phabricator you are running in your report. The version is just the Git hash

src/docs/user/upgrading.diviner

@@ -53,6 +53,9 @@ Upgrade Process
 
 IMPORTANT: You **MUST** restart Apache or PHP-FPM after upgrading.
 
+IMPORTANT: You **MUST** upgrade `libphutil`, `arcanist` and `phabricator` at
+the same time.
+
 Phabricator runs on many different systems, with many different webservers.
 Given this diversity, we don't currently maintain a comprehensive upgrade
 script which can work on any system. However, the general steps are the same

src/docs/user/userguide/arcanist.diviner

@@ -12,7 +12,7 @@ A detailed command reference is available by running `arc help`. This
 document provides an overview of common workflows and installation.
 
 Arcanist has technical, contributor-focused documentation here:
-<http://www.phabricator.com/docs/arcanist/>
+<https://secure.phabricator.com/book/arcanist/>
 
 = Quick Start =