posix: Rename killinfo()

Apparently killinfo() is not defined by POSIX, glibc or FreeBSD.  Rename
killinfo() to _POSIX_signals_Send() to cleary mark it as an internal
function.

cpukit/posix/include/rtems/posix/psignalimpl.h

@@ -107,7 +107,7 @@ bool _POSIX_signals_Clear_signals(
   bool                do_signals_acquire_release
 );
 
-int killinfo(
+int _POSIX_signals_Send(
   pid_t               pid,
   int                 sig,
   const union sigval *value

cpukit/posix/src/kill.c

@@ -30,6 +30,6 @@ int kill(
   int   sig
 )
 {
-  return killinfo( pid, sig, NULL );
+  return _POSIX_signals_Send( pid, sig, NULL );
 }
 

cpukit/posix/src/kill_r.c

@@ -37,6 +37,6 @@ int _kill_r(
   int            sig
 )
 {
-  return killinfo( pid, sig, NULL );
+  return _POSIX_signals_Send( pid, sig, NULL );
 }
 #endif

cpukit/posix/src/killinfo.c

@@ -54,7 +54,7 @@
 #define _POSIX_signals_Is_interested( _api, _mask ) \
   ( (_api)->signals_unblocked & (_mask) )
 
-int killinfo(
+int _POSIX_signals_Send(
   pid_t               pid,
   int                 sig,
   const union sigval *value

cpukit/posix/src/sigqueue.c

@@ -31,5 +31,5 @@ int sigqueue(
   const union sigval  value
 )
 {
-  return killinfo( pid, signo, &value );
+  return _POSIX_signals_Send( pid, signo, &value );
 }