sqlite3: fix readline

--enable-readline is broken:
  - it searches for readline.h instead of readline/readline.h
  - it does not abort when it fails to find headers
Use --with-readline-inc so that it sets HAVE_READLINE.

Also use the dedicated configure option to enable update limit.
And sqlite3 does not depend directly on ncurses.

component/sqlite3/buildout.cfg

@@ -16,13 +16,14 @@ md5sum = 79f2507907721b770cbec98195cecece
 configure-options =
   --disable-static
   --disable-tcl
-  --enable-readline
+  --enable-update-limit
+  --with-readline-inc=-I${readline:location}/include
 post-install =
   gcc -I%(location)s/include -fPIC -shared ext/misc/cksumvfs.c -o %(location)s/lib/cksumvfs.so
 # Increase MAX_VARIABLE_NUMBER like many os. For example:
 # https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/sqlite
 # NEO needs SQLITE_ENABLE_UPDATE_DELETE_LIMIT to drop partitions.
 environment =
-  CPPFLAGS=-I${readline:location}/include -I${ncurses:location}/include -I${zlib:location}/include -DSQLITE_MAX_VARIABLE_NUMBER=250000 -DSQLITE_ENABLE_UPDATE_DELETE_LIMIT=1
-  LDFLAGS=-Wl,-rpath=@@LOCATION@@/lib -Wl,-rpath=${readline:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${readline:location}/lib -L${ncurses:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  CPPFLAGS=-I${zlib:location}/include -DSQLITE_MAX_VARIABLE_NUMBER=250000
+  LDFLAGS=-Wl,-rpath=@@LOCATION@@/lib -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
   PATH=${tcl:location}/bin:${xz-utils:location}/bin:%(PATH)s