Implemented some more calls in unistd.h.

Replaced the unused syscall for getdtablesize() with one for access().
Implemented sys_access() and added it to the file system interface.
Removed the fs function interface from vfs.h.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@738 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/ksyscalls.h

@@ -81,8 +81,8 @@ enum {
 	SYSCALL_TEST_AND_SET, /* 70 */
 	SYSCALL_SYSCTL,
 	SYSCALL_SOCKET,
-	SYSCALL_GETDTABLESIZE,	/* ToDo: to be removed, can be reused */
-	SYSCALL_FD_STAT,
+	SYSCALL_ACCESS,
+	SYSCALL_READ_STAT_FD,
 	SYSCALL_READ_DIR,
 	SYSCALL_REWIND_DIR,
 	SYSCALL_OPEN_DIR,