Really fix posix includes (from Samuel Thibault)
<youpi> E* macros are reserved names in posix applications are not supposed to define
 them, actually
<youpi> well, strictly speaking, E[0-9A-Z].* are reserved so E_SUCCESS is fine.
"Additional macro definitions, beginning with E and a digit or E and an uppercase letter may also be specied by the implementation."
Merge pull request #594 from LocutusOfBorg/hurd-fix

Really fix posix includes (from Samuel Thibault)
Merge pull request #593 from LocutusOfBorg/remove-rpath

Remove rpath
Rename ? Menu to Info and use F1 to open Help
use ettercap icon for GTK windows
About Dialog for GTK UI
restructured AUTHORS file
Protocol selection by radio buttons
rework target selection dialog
fix error when setting visualisation method
swap OK and cancel buttons as recommended for GTK applications
support multi selection for context menus
context menu in hosts list
Accelerator keys only with modifier keys
make connection list filterable
fix inject data/file dialogs
rework connections detail dialog
move gtkui_iptoa_deferred to ec_gtk.c
rework Profile Details dialog
asyncronously resolve names in hosts and profiles list