Discontinue HPUX support

cde/programs/dtmail/libDtMail/RFC/RFCMailBox.C

@@ -63,7 +63,7 @@
 #include <sys/stat.h>
 #include <sys/param.h>
 #include <sys/uio.h>
-#if !defined(__aix) && !defined(__hpux) && !defined(__linux__) && !defined(CSRG_BASED)
+#if !defined(__aix) && !defined(__linux__) && !defined(CSRG_BASED)
 #include <sys/systeminfo.h>
 #endif
 #include <sys/wait.h>
@@ -95,9 +95,7 @@ extern "C" {
 
 #if defined(sun)
 #define	LCL_SIG_HANDLER_SIGNATURE	
-#elif defined(__hpux)
-#define	LCL_SIG_HANDLER_SIGNATURE	__harg
-#elif defined(__aix) || defined(__alpha) || defined(__linux__) || defined(CSRG_BASED)
+#elif defined(__aix) || defined(__linux__) || defined(CSRG_BASED)
 #define	LCL_SIG_HANDLER_SIGNATURE	int
 #endif
 

cde/programs/dtmail/libDtMail/RFC/RFCTransport.C

@@ -975,7 +975,7 @@ RFCTransport::signalRegister(void)
     if (initialized) return;
     initialized = 1;
 
-#if defined(hpux) || defined(_aix) || defined(__linux__) || \
+#if defined(_aix) || defined(__linux__) || \
     (defined(sun) && OSMAJORVERSION>=5 && OSMINORVERSION>4) || defined(CSRG_BASED)
     // SunOS 5.5 and above defined prototype for signal handler
     act.sa_handler = (void (*)(int))&RFCTransport::childHandler;

cde/programs/dtmail/libDtMail/RFC/SunV3.C

@@ -57,8 +57,6 @@
 */ 
 #if defined(SunOS)
 #include <stropts.h>
-#elif defined(HPUX)
-#include <sys/poll.h>
 #elif defined(_AIX) || defined(__linux__)
 #define INFTIM (-1)             /* Infinite timeout */
 #endif