component/proftpd: build with slapos ncurses

to prevent using system package when ncurses-dev is installed

component/proftpd/buildout.cfg

@@ -7,6 +7,7 @@ extends =
   ../zlib/buildout.cfg
   ../curl/buildout.cfg
   ../libtool/buildout.cfg
+  ../ncurses/buildout.cfg
   ../git/buildout.cfg
   ../patch/buildout.cfg
   ../zstd/buildout.cfg
@@ -32,8 +33,8 @@ configure-options =
   --with-modules=mod_sftp:mod_ban:mod_rewrite
 environment =
   CFLAGS=-DPR_RUN_DIR=\"/proc/self/cwd/var\"
-  CPPFLAGS=-I${zlib:location}/include -I${openssl:location}/include
-  LDFLAGS=-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib
+  CPPFLAGS=-I${zlib:location}/include -I${ncurses:location}/include -I${openssl:location}/include
+  LDFLAGS=-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib
   install_user=${proftpd-info:USER}
   install_group=${proftpd-info:GROUP}
 patch-binary = ${patch:location}/bin/patch