Privacy: Add policy link to login screen.

Personal data collection is more likely for registered users than casual visitors, and the privacy policy might have been updated since a user last logged in. Those changes could impact the collection of personal data from registered users, so it makes sense to provide a link to the policy before users log in.

Props voneff, xkon, melchoyce, chetan200891, desrosj.
Fixes #43721.

Built from https://develop.svn.wordpress.org/trunk@43120


git-svn-id: http://core.svn.wordpress.org/trunk@42949 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/login-rtl.css

@@ -194,6 +194,14 @@ p {
 	color: #124964;
 }
 
+.login .privacy-policy-page-link {
+	text-align: center;
+	width: 100%;
+	position: absolute;
+	bottom: 20px;
+	right: 0;
+}
+
 .login form .input,
 .login input[type="text"] {
 	font-size: 24px;
@@ -252,6 +260,13 @@ body.interim-login {
 	width: device-width;
 }
 
+@media ( max-height: 600px ) {
+	.login .privacy-policy-page-link {
+		position: relative;
+		margin: 60px 0 20px 0;
+	}
+}
+
 @media screen and ( max-height: 550px ) {
 	#login {
 		padding: 20px 0;

wp-admin/css/login.css

@@ -194,6 +194,14 @@ p {
 	color: #124964;
 }
 
+.login .privacy-policy-page-link {
+	text-align: center;
+	width: 100%;
+	position: absolute;
+	bottom: 20px;
+	left: 0;
+}
+
 .login form .input,
 .login input[type="text"] {
 	font-size: 24px;
@@ -252,6 +260,13 @@ body.interim-login {
 	width: device-width;
 }
 
+@media ( max-height: 600px ) {
+	.login .privacy-policy-page-link {
+		position: relative;
+		margin: 60px 0 20px 0;
+	}
+}
+
 @media screen and ( max-height: 550px ) {
 	#login {
 		padding: 20px 0;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43118';
+$wp_version = '5.0-alpha-43120';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-login.php

@@ -261,6 +261,7 @@ function login_footer( $input_id = '' ) {
 											printf( _x( '← Back to %s', 'site' ), get_bloginfo( 'title', 'display' ) );
 	?>
 	</a></p>
+	<?php the_privacy_policy_link( '<div class="privacy-policy-page-link">', '</div>' ); ?>
 	<?php endif; ?>
 
 	</div>