[users] Massage the weak-passwords settings

- since the wording of the checkbox itself (and the functionality)
   is to enforce strong passwords, need to switch out some
   logic and fix the wording of the documentation.

src/modules/users/UsersViewStep.cpp

@@ -174,12 +174,7 @@ UsersViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     }
 
     m_widget->setPasswordCheckboxVisible( CalamaresUtils::getBool( configurationMap, "allowWeakPasswords", false ) );
-
-    if ( configurationMap.contains( "doPasswordChecks" )
-         && configurationMap.value( "doPasswordChecks" ).type() == QVariant::Bool )
-    {
-        m_widget->setValidatePasswordDefault( configurationMap.value( "doPasswordChecks" ).toBool() );
-    }
+    m_widget->setValidatePasswordDefault( !CalamaresUtils::getBool( configurationMap, "allowWeakPasswordsDefault", false) );
 
     QString shell( QLatin1String( "/bin/bash" ) );  // as if it's not set at all
     if ( configurationMap.contains( "userShell" ) )

src/modules/users/users.conf

@@ -81,7 +81,7 @@ doReusePassword: true
 #    comment out the relevant 'passwordRequirements' keys below.
 #  - To disable all password validations:
 #    set both 'allowWeakPasswords' and 'allowWeakPasswordsDefault' to true.
-#    (This will show the box *Allow weak passwords* in the user-
+#    (That will show the box *Allow weak passwords* in the user-
 #    interface, and check it by default).
 passwordRequirements:
     minLength: -1  # Password at least this many characters
@@ -90,19 +90,22 @@ passwordRequirements:
         - minlen=0
         - minclass=0
         
-# You can control the visibility of the 'weak passwords' checkbox here.
+# You can control the visibility of the 'strong passwords' checkbox here.
 # Possible values are: 
 #  - true to show or 
-#  - false to hide 
+#  - false to hide  (default)
 # the checkbox. This checkbox allows the user to choose to disable
-# password-strength-checks.
-allowWeakPasswords: true
-# You can control the initial state for the 'weak passwords' checkbox here.
+# password-strength-checks. By default the box is **hidden**, so
+# that you have to pick a password that satisfies the checks.
+allowWeakPasswords: false
+# You can control the initial state for the 'strong passwords' checkbox here.
 # Possible values are: 
-#  - true to check or 
-#  - false to uncheck 
-# the checkbox by default.
-doPasswordChecks: true
+#  - true to uncheck or 
+#  - false to check (default)
+# the checkbox by default. Since the box is labeled to enforce strong
+# passwords, in order to **allow** weak ones by default, the box needs
+# to be unchecked.
+allowWeakPasswordsDefault: false
 
 # Shell to be used for the regular user of the target system.
 # There are three possible kinds of settings: