Fixed #19377 - Emphasized database host link in tutorial

docs/intro/tutorial01.txt

@@ -220,8 +220,8 @@ your database connection settings.
   SQLite).
 
 * :setting:`HOST` -- The host your database is on. Leave this as
-  an empty string if your database server is on the same physical
-  machine (not used for SQLite).
+  an empty string (or possibly ``127.0.0.1``) if your database server is on the
+  same physical machine (not used for SQLite). See :setting:`HOST` for details.
 
 If you're new to databases, we recommend simply using SQLite by setting
 :setting:`ENGINE` to ``'django.db.backends.sqlite3'`` and :setting:`NAME` to

docs/ref/databases.txt

@@ -34,13 +34,9 @@ aggregate with a database backend that falls within the affected release range.
 .. _Release 8.2.5: http://www.postgresql.org/docs/devel/static/release-8-2-5.html
 
 PostgreSQL connection settings
-------------------------------
+-------------------------------
 
-By default (empty :setting:`HOST`), the connection to the database is done
-through UNIX domain sockets ('local' lines in pg_hba.conf). If you want to
-connect through TCP sockets, set :setting:`HOST` to 'localhost' or '127.0.0.1'
-('host' lines in pg_hba.conf). On Windows, you should always define
-:setting:`HOST`, as UNIX domain sockets are not available.
+See :setting:`HOST` for details.
 
 Optimizing PostgreSQL's configuration
 -------------------------------------

docs/ref/settings.txt

@@ -431,10 +431,12 @@ MySQL will connect via a Unix socket to the specified socket. For example::
 If you're using MySQL and this value *doesn't* start with a forward slash, then
 this value is assumed to be the host.
 
-If you're using PostgreSQL, an empty string means to use a Unix domain socket
-for the connection, rather than a network connection to localhost. If you
-explicitly need to use a TCP/IP connection on the local machine with
-PostgreSQL, specify ``localhost`` here.
+If you're using PostgreSQL, by default (empty :setting:`HOST`), the connection
+to the database is done through UNIX domain sockets ('local' lines in
+``pg_hba.conf``). If you want to connect through TCP sockets, set
+:setting:`HOST` to 'localhost' or '127.0.0.1' ('host' lines in ``pg_hba.conf``).
+On Windows, you should always define :setting:`HOST`, as UNIX domain sockets
+are not available.
 
 .. setting:: NAME