trafficserver: add missing PATH.

* also disable lua explicitly. anyway lua 5.3 cannot be used with trafficserver 4.2.3.
* also cleanup.

component/trafficserver/buildout.cfg

 [buildout]
 extends =
-  ../../component/lua/buildout.cfg
-  ../../component/pkgconfig/buildout.cfg
-  ../../component/libtool/buildout.cfg
-  ../../component/make/buildout.cfg
-  ../../component/openssl/buildout.cfg
-  ../../component/tcl/buildout.cfg
-  ../../component/libxml2/buildout.cfg
-  ../../component/pcre/buildout.cfg
-  ../../component/libcap/buildout.cfg
-  ../../component/flex/buildout.cfg
-  ../../component/ncurses/buildout.cfg
-  ../../component/curl/buildout.cfg
-  ../../component/zlib/buildout.cfg
+  ../libtool/buildout.cfg
+  ../libxml2/buildout.cfg
+  ../make/buildout.cfg
+  ../ncurses/buildout.cfg
+  ../openssl/buildout.cfg
+  ../pcre/buildout.cfg
+  ../perl/buildout.cfg
+  ../pkgconfig/buildout.cfg
+  ../tcl/buildout.cfg
+  ../zlib/buildout.cfg
 
 parts =
   trafficserver
@@ -26,7 +23,7 @@ configure-options =
   --with-xml=libxml2
   --with-libxml2=${libxml2:location}
   --with-pcre=${pcre:location}
-  --with-lua=${lua:location}
+  --without-lua
   --with-ncurses=${ncurses:location}
   --with-tcl=${tcl:location}/lib/
   --with-lzma=${xz-utils:location}
@@ -34,8 +31,8 @@ configure-options =
   --disable-hwloc
   --enable-experimental-plugins
 environment =
-  PATH=${make:location}/bin:${libtool:location}/bin:${pkgconfig:location}/bin:%(PATH)s
-  LDFLAGS =-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${tcl:location}/lib -Wl,-rpath=${tcl:location}/lib -Wl,-rpath=${openssl:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  PATH=${libtool:location}/bin:${make:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:%(PATH)s
+  LDFLAGS =-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${openssl:location}/lib -Wl,-rpath=${openssl:location}/lib -L${tcl:location}/lib -Wl,-rpath=${tcl:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
 make-target =
   check
   install