* Added new (currently private) API class BMimeSnifferAddon,

representing the interface for, well, MIME sniffer add-ons.
* Implemented the respective add-on manager and make use of it in
  the MIME database code. Unfortunately the MIME DB code completely
  lives in libbe.so and hence I had to put my code there too.
  IMHO we should (one day) remove the direct (read-only) MIME DB
  access from libbe and move everything into the registrar.
  Currently the add-on manager supports built-in add-ons only; it
  doesn't really load anything from disk ATM.
* Added a built-in text sniffer add-on to the registrar. It's based
  upon the BSD file tool code.

This closes bug #250 (plain text files are identified as such, now).



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17784 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/jam/HeadersRules

@@ -341,7 +341,8 @@ rule UseLegacyObjectHeaders
 rule FStandardOSHeaders
 {
 	local osIncludes = add-ons add-ons/file_system add-ons/graphics
-					   add-ons/input_server add-ons/screen_saver
+					   add-ons/input_server add-ons/registrar
+					   add-ons/screen_saver
 					   add-ons/tracker app device drivers game interface
 					   kernel media mail midi midi2 net opengl storage support
 					   translation ;
@@ -352,7 +353,8 @@ rule FStandardOSHeaders
 rule FStandardHeaders
 {
 	local osIncludes = add-ons add-ons/file_system add-ons/graphics
-					   add-ons/input_server add-ons/screen_saver
+					   add-ons/input_server add-ons/registrar
+					   add-ons/screen_saver
 					   add-ons/tracker app device drivers game interface
 					   kernel media mail midi midi2 net opengl storage support
 					   translation ;