libexec: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by:		Netflix

libexec/bootpd/bootpd.c

@@ -37,7 +37,6 @@ SOFTWARE.
  *	See ./ToDo
  */
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/socket.h>

libexec/bootpd/bootpgw/bootpgw.c

@@ -30,7 +30,6 @@ SOFTWARE.
  * one subnet to a BOOTP server on a different subnet.
  */
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/socket.h>

libexec/bootpd/rtmsg.c

@@ -39,7 +39,6 @@
  * from arp.c	8.2 (Berkeley) 1/2/94
  */
 
-#include <sys/cdefs.h>
 #include <sys/param.h>
 /*
  * Verify that we are at least 4.4 BSD