-bug#0000724: cactid truncate script command when reindex

-bug#0000736: Solaris 8 : Alarm Clock message 
-feature: enabled signal handling in cactid
plus significant header rearrangement and correction of some compile issue.

git-svn-id: svn+ssh://repo.cacti.net/var/data/svnroot/cacti/branches/BRANCH_0_8_6/cactid@3613 860744bd-22fc-0310-8c96-e9fe5004b5ca

nft_popen.h

@@ -21,10 +21,6 @@
  *
  ******************************************************************************
  */
-#ifndef nft_popen_h
-#define nft_popen_h
-
-#include <pthread.h>
 
 /*!
  *  The nft_popen() function forks a command in a child process, and returns
@@ -46,7 +42,6 @@
  */
 extern int	nft_popen(const char * command, const char * mode);
 
-
 /*!
  *  nft_pchild
  *
@@ -59,7 +54,6 @@ extern int	nft_popen(const char * command, const char * mode);
  */
 extern int	nft_pchild(int fd);
 
-
 /*!
  *  nft_pclose
  *
@@ -72,6 +66,3 @@ extern int	nft_pchild(int fd);
  *	ECHILD	waitpid() failed.
  */
 extern int	nft_pclose(int fd);
-
-
-#endif	/* nft_popen_h */