first_boot: Don't ask for a new hostname

- Setting a new hostname is not one of the most buring issues to be take
  care of during the setup process.

- Also, most likely the user will access the FreedomBox machine using
  mDNS hostname such as freedombox.local.  Changing the hostname mid
  setup might have consequences that need to thought about properly.

plinth/modules/first_boot/forms.py

@@ -15,9 +15,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+"""
+Forms for first boot module.
+"""
+
 from django import forms
 from django.contrib import auth, messages
-from django.core import validators
 from gettext import gettext as _
 
 from plinth import actions
@@ -27,25 +30,14 @@ from plinth.modules.users.forms import GROUP_CHOICES
 
 
 class State0Form(forms.ModelForm):
-    """Firstboot state 0: Set hostname and create a new user"""
-    hostname = forms.CharField(
-        label=_('Name of your FreedomBox'),
-        help_text=_('For convenience, your FreedomBox needs a name.  It \
-should be something short that does not contain spaces or punctuation. \
-"Willard" would be a good name while "Freestyle McFreedomBox!!!" would \
-not. It must be alphanumeric, start with an alphabet and must not be greater \
-than 63 characters in length.'),
-        validators=[
-            validators.RegexValidator(r'^[a-zA-Z][a-zA-Z0-9]{,62}$',
-                                      _('Invalid hostname'))])
-
+    """Firstboot state 0: create a new user."""
     def __init__(self, *args, **kwargs):
         self.request = kwargs.pop('request')
         super(State0Form, self).__init__(*args, **kwargs)
 
     class Meta:
         model = auth.models.User
-        fields = ('hostname', 'username', 'password')
+        fields = ('username', 'password')
         widgets = {
             'password': forms.PasswordInput,
         }
@@ -58,8 +50,7 @@ than 63 characters in length.'),
         }
 
     def save(self, commit=True):
-        """Set hostname, create and login the user"""
-        config.set_hostname(self.cleaned_data['hostname'])
+        """Create and log the user in."""
         user = super(State0Form, self).save(commit=False)
         user.set_password(self.cleaned_data['password'])
         if commit:

plinth/modules/first_boot/views.py

@@ -28,16 +28,11 @@ from .forms import State0Form
 
 
 class State0View(CreateView):
-    """Setup hostname and create user account"""
+    """Create user account and log the user in."""
     template_name = 'firstboot_state0.html'
     form_class = State0Form
     success_url = reverse_lazy('first_boot:state10')
 
-    def get_initial(self):
-        initial = super(State0View, self).get_initial()
-        initial['hostname'] = config.get_hostname()
-        return initial
-
     def get_form_kwargs(self):
         """Make request available to the form (to insert messages)"""
         kwargs = super(State0View, self).get_form_kwargs()