Log Message:
Update www/vimb to 2.12

Changes:
## 2.12 - 2017-04-11
### Added
* Queueing of key events - fixes swalled chars in case of some imap bindings
  #258 (thanks to Michael Mackus)
* Allow to disable xembed by `FEATURE_NO_XEMBED` to compile on wayland only
  platforms (thanks to Patrick Steinhardt)
* Custom default_zoom setting disables HIGH_DPI logic (thanks to Robert Timm)
* Allow link activation from search result via `<CR>` #131

### Changed
* Allow shortcuts without parameters #329
* Write soup cache to disk after each page load to allow other instances to
  pick this up.
* Use the beginning position of links for hinting (thanks to Yutao Yuan)

### Fixed
* Fix path expansion to accept only valid POSIX.1-2008 usernames (thanks to
  Manzur Mukhitdinov)
* Fix default previouspattern (thanks to Nicolas Porcel)

Please note that this is the last release of the vimb for WebKit1. WebKit1 is not
supported anymore and is considered unsecure.
So this release is a way to end the WebKit1 version of vimb gracefully.
I hope the WebKit2 branch will be in alpha state soon. Hope some developer
will help to migrate the known features to the new WebKit2 process model.
Help is appreciated.