As Internet Explorer is not a supported browser anymore, browser Kerberos
configuration page shows warning to user about the same.

Fixes : https://fedorahosted.org/freeipa/ticket/5656

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

Configure.jar used to be used with firefox version < 10 which is not
supported anymore, thus this can be removed.

https://fedorahosted.org/freeipa/ticket/5144

Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

- As Chromium and Chrome share most of the same code base but are
  configured in different locations, add a note showing the different
  configuration locations.

A part of https://fedorahosted.org/freeipa/ticket/823

Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

* IE section moved at the end
* Chrome section added
* FF and IE icons removed

https://fedorahosted.org/freeipa/ticket/823

Reviewed-By: Martin Basti <mbasti@redhat.com>

https://fedorahosted.org/freeipa/ticket/4278

Reviewed-By: Endi Sukma Dewata <edewata@redhat.com>

Issue:
* There was no caching policy specified.
* -> Browsers use their own default policy.
* -> After upgrade, some Web UI files might have been actualized some not.
* -> With schema change may result into weird bugs in Web UI

Solution considerations:

1. Detect server version change and hard-reload at runtime
Detection is easy. Problem is the reload. Obvious candidate 'window.location.reload(true)' works in Firefox but not in Chrome because expected behavior when parameter is used is not in standard and therefore Chromium/WebKit authors did not implement it.

2. Application Cache
HTML 5 technology which lets web apps to run offline. Besides weird issues with event handlers which I encountered, this would be an ideal candidate. Simple change of manifest file would lead to reload of all files (requires reload of page to used the new files).

Showstopper was usage with untrusted certificate. If user did not add exception for the cert or its CA and would visit the page for a second time, all AJAX calls would fail.

3. Set Expires to now() for everything
Web UI rarely changes so this is an overkill. Setting it to different value is not a solution either. We can't predict when the upgrade will happen and when new Web UI will be needed.

Solution:
* Implemented a mini loader which loads basic resources. Dojo loader takes action after Dojo is loaded.
* The loader adds a version parameter (?v=__NUM_VERSION__) to all requests.
* Version is defined in the loader. It's set to current in `make version-update`.
* All static pages use this loader to fetch their resources.
* Version is also passed to dojo loader as cache-bust for the same effect.
* Expire header was set to 'access time plus 1 year' for /ui folder. Exceptions are HTML files and loader (set to immediate expiration).

Possible issues:
* Images are cached but not requested with version param.
  * Images with version and without are considered different
  * -> We would have to attach version to all URIs - in CSS and in JS. But we should avoid changing jQuery UI CSS.
  * Proposed solution is to change image name when changing image. Image change is done rarely.
* Version is set by build and therefore updated just on server update. It might cause trouble with different update schedule of plugins.
  * No action taken to address this issue yet.
  * We might leave it on plugin devs (own .conf in /etc/httpd/conf.d/)
  * or set expires to now for all plugins
* running `make version-update` is required in order to use static version of UI for testing

https://fedorahosted.org/freeipa/ticket/3798

Manual configuration page for other browsers (ssbrowser.html) doesn't work in IE 10 - error page is displayed.

This patch is conditioning creation of Firefox configuration object so that configure.jar is requested only in Firefox. IE doesn't request it and so it does not fail.

https://fedorahosted.org/freeipa/ticket/3645

Third party JS libraries which are not AMD modules were moved to src/libs/
directory. Links in html files were changed accordingly.

https://fedorahosted.org/freeipa/ticket/112

Delegation is not needed since support of s4u2proxy mechanism.

https://fedorahosted.org/freeipa/ticket/3094

browserconfig.html was changed to use new FF extension. The page is completely Firefox specific therefore the title was changed from 'Configure browser' to 'Firefox configuration'. Instruction to import CA cert in unauthorized.html are FF specific too, so they were moved to browserconfig.html. Unauthorized.html text was changed to distinguish FF config and other browsers. Now the page shows link for FF (browserconfig.html) and other browsers (ssbrowser.html). Ssbrowser.html should be enhanced by more configurations and browsers later [1].

Old configuration method was moved to ssbrowser.html.

Unauthorized dialog in Web UI now links to http://../unauthorized.html instead of https. This change is done because of FF strange handling of extension installations from https sites [2]. Firefox allows ext. installation from https sites only when the certificate is signed by some build-in CA. To allow custom CAs an option in about:config has to be changed which don't help us at all because we wants to avoid manual changes in about:config.

The design of browserconfig is inspired by Kyle Baker's design (2.1 Enhancements_v2.odt). It is not exactly the same. Highlighting of the steps wasn't used because in some cases we can switch some steps.

Ticket: https://fedorahosted.org/freeipa/ticket/3094

[1] https://fedorahosted.org/freeipa/ticket/823
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=688383