replaced sys_kill with general thread-aimed sys_send_signal; cleaned up

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1740 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/kernel/syscalls.h

@@ -61,7 +61,7 @@ status_t sys_get_next_thread_info(team_id team, int32 *cookie, thread_info *info
 status_t sys_get_team_info(team_id id, team_info *info);
 status_t sys_get_next_team_info(int32 *cookie, team_info *info);
 
-int sys_kill(pid_t pid, int sig);
+int sys_send_signal(pid_t tid, uint sig);
 int sys_sigaction(int sig, const struct sigaction *act, struct sigaction *oact);
 bigtime_t sys_set_alarm(bigtime_t time, uint32 mode);
 

headers/private/kernel/ksyscalls.h

@@ -113,7 +113,7 @@ enum {
 	SYSCALL_REMOVE_ATTR,
 	SYSCALL_RENAME_ATTR,
 	SYSCALL_RETURN_FROM_SIGNAL,
-	SYSCALL_KILL,
+	SYSCALL_KILL,		// obsolete
 	SYSCALL_SIGACTION,				/* 105 */
 	SYSCALL_OPEN_INDEX_DIR,
 	SYSCALL_CREATE_INDEX,

headers/private/kernel/thread.h

@@ -21,7 +21,7 @@ void start_scheduler(void);
 
 #define BLOCKABLE_SIGS	(~((1L << (SIGKILL - 1)) | (1L << (SIGSTOP - 1))))
 
-void handle_signals(struct thread *t, int state);
+int handle_signals(struct thread *t, int state);
 
 void thread_enqueue(struct thread *t, struct thread_queue *q);
 struct thread *thread_lookat_queue(struct thread_queue *q);