fixed broken links and added a couple redirects

Author: dwicinas

advocacy_docs/supported-open-source/postgresql/installing/macos.mdx

@@ -9,7 +9,7 @@ EDB provides MacOS installers for PostgreSQL on the [EDB downloads page](http:/
 
 For a detailed walk-through of the installation process on Mac OS, see [this tutorial](http://www.enterprisedb.com/postgres-tutorials/installation-postgresql-mac-os).
 
-When the PostgreSQL installation finishes, you can optionally invoke the Stack Builder package manager. Stack Builder provides a graphical interface for downloading and installing applications, drivers, utilities, and their dependencies. See [Using Stack Builder](../03_using_stackbuilder) for more information.
+When the PostgreSQL installation finishes, you can optionally invoke the Stack Builder package manager. Stack Builder provides a graphical interface for downloading and installing applications, drivers, utilities, and their dependencies. See [Using Stack Builder](using_stackbuilder) for more information.
 
 !!! Note
     If you're using the graphical installation wizard to perform a system upgrade, the installer preserves the configuration options specified during the previous installation.

advocacy_docs/supported-open-source/postgresql/installing/windows.mdx

@@ -10,10 +10,11 @@ legacyRedirects:
   - "/edb-docs/d/postgresql/installation-getting-started/installation-guide-installers/10/PostgreSQL_Installation_Guide.1.09.html"
 redirects:
   - /supported-open-source/postgresql/installer/02_installing_postgresql_with_the_graphical_installation_wizard/01_invoking_the_graphical_installer/
+  - /supported-open-source/postgresql/installer/02_installing_postgresql_with_the_graphical_installation_wizard/windows/
 ---
 You can use the graphical installation wizard to install PostgreSQL on Windows. 
 
-When the PostgreSQL installation finishes, you can optionally invoke the Stack Builder package manager. Stack Builder provides a graphical interface for downloading and installing applications, drivers, utilities, and their dependencies. See [Using Stack Builder](../03_using_stackbuilder) for more information.
+When the PostgreSQL installation finishes, you can optionally invoke the Stack Builder package manager. Stack Builder provides a graphical interface for downloading and installing applications, drivers, utilities, and their dependencies. See [Using Stack Builder](using_stackbuilder) for more information.
 
 For information about preparing to use command-line tools after installation, see [Command-line tools](#command-line-tools).
 
@@ -52,7 +53,7 @@ To perform an installation using the graphical installation wizard, you need sup
 
     -   **PostgreSQL Server** to install the PostgreSQL database server.
     -   **pgAdmin 4** to install pgAdmin 4. This option is available for PostgreSQL version 13.0 and later.
-    -   **Stack Builder** to install the Stack Builder utility. For more information, see [Using Stack Builder](../03_using_stackbuilder).
+    -   **Stack Builder** to install the Stack Builder utility. For more information, see [Using Stack Builder](using_stackbuilder).
     -   **Command Line Tools** to install PostgreSQL tools such as `psql`, `pg_isready`, `pgbench`, `clusterdb`, `createdb`, `dropdb`, `createuser`, `dropuser`, `pg_basebackup`, `pg_dump`, `pg_dumpall`, `pg_restore`, `reindexdb`, `vacuumdb`, and `vacuumlo`. This isn't a comprehensive list, and the command-line tools installed can vary by platform.
 
   Select **Next**.

advocacy_docs/supported-open-source/postgresql/overview.mdx

@@ -1,5 +1,7 @@
 ---
 title: "Installation overview"
+redirects:
+  - /supported-open-source/postgresql/overview/
 ---
 
 EDB's PostgreSQL installers and installation packages simplify the process of installing PostgreSQL on your computer. They provide: