version up: nano 2.8.4

plus:
- do not fail if ncurses is installed on the system
- enable libmagic
- load share/nano/*.nanorc by default

component/nano/buildout.cfg

 [buildout]
 parts =
   nano
-  
+
 extends = 
+  ../file/buildout.cfg
   ../ncurses/buildout.cfg
 
 [nano]
 recipe = slapos.recipe.cmmi
-version = 2.2.6
-url = http://www.nano-editor.org/dist/v2.2/nano-2.2.6.tar.gz
-md5sum = 03233ae480689a008eb98feb1b599807
+url = http://www.nano-editor.org/dist/v2.8/nano-2.8.4.tar.xz
+md5sum = 02ff28870194178595b287fc16fa611b
 environment=
-    CFLAGS=-I${ncurses:location}/include
-    LDFLAGS=-L${ncurses:location}/lib/ -Wl,-rpath=${ncurses:location}/lib/
\ No newline at end of file
+  CPPFLAGS=-I${file:location}/include
+  NCURSESW_CFLAGS=-I${ncurses:location}/include
+  LDFLAGS=-L${file:location}/lib/ -Wl,-rpath=${file:location}/lib/ -L${ncurses:location}/lib/ -Wl,-rpath=${ncurses:location}/lib/
+location = ${buildout:parts-directory}/${:_buildout_section_name_}
+post-install =
+  cd ${:location} && mkdir etc &&
+  echo include "${:location}/share/nano/*.nanorc" > etc/nanorc