vim-patch:7.4.170

Problem:    Some help tags don't work with ":help". (Tim Chase)
Solution:   Add exceptions.

https://code.google.com/p/vim/source/detail?r=8122eab8fcdbbdaac62dfbf7c6458cb3e6f46b04
Removed not defined prototypes in os_unix.h

  * reset_signals, vim_handle_signal:
    signal handling was rewritten, not defined anywhere

  * related to x clipboard handling, not defined anywhere:
    * {setup,start,stop,clear}_xterm_clip
    * stop_xterm_trace
    * clip_xterm_{own_selection,lose_selection,request_selection,set_selection}

  * related to XSMP (x session management protocol):
    * xsmp_{handle_requests,init,close}
Remove unused define
remove DO_AUTOCHDIR
remove MB_{IS,TO}{UPPER,LOWER}
remove pchar from macros.h
remove reference to BROKEN_TOUPPER
Remove netbeans and sun workshop
Remove Amiga stuff
Remove SniFF
Remove HPUX and Vim 5.x compatible digraphs
Remove BalloonEval
Remove clientserver
Remove Xim
Remove python, perl, lua, ruby
Remove mzscheme
Remove ole
Remove tcl
Remove xpm
Remove xterm_save