Merge changes made in Gnus master

Merge changes made in Gnus master

2013-06-19  Lars Magne Ingebrigtsen  <larsi@gnus.org>
* net/eww.el (eww-process-text-input): Display passwords as asterisks.
* net/shr.el (shr-make-table-1): Protect against invalid column-spans.

2013-06-19  Tom Tromey  <tromey@redhat.com>
* net/eww.el (eww-top-url): Remove.
(eww-home-url, eww-start-url, eww-contents-url): New defvars.
(eww-render): Set new variables.  Don't set eww-top-url.
(eww-handle-link): Handle "prev", "home", and "contents".
Downcase the rel text.
(eww-top-url): Choose best top URL.

2013-06-19  Lars Magne Ingebrigtsen  <larsi@gnus.org>
* net/eww.el: Rewrite to implement form elements "by hand" instead of
relying in widget.el.  Using widget.el leads to too many
user interface inconsistencies.
(eww-self-insert): Implement entering commands in text fields.
(eww-process-text-input): New function to make text input field editing
work.
(eww-submit): Rewrite to use the new-style form methods.
(eww-select-display): Display the correct selected item.
(eww-change-select): Implement changing the select value.
(eww-toggle-checkbox): Implement radio/checkboxes.
(eww-update-field): Fix compilation error.
(eww-tag-textarea): Implement <textarea>.
* net/shr.el (shr-urlify): Use `keymap' instead of `local-map' so that we
don't shadow mode-specific bindings.
* net/eww.el (eww-browse-url): Don't push stuff onto history if there's
nothing to push.
* net/shr.el (shr-map): Bind [down-mouse-1] to browse URLs.