Remove Unixware and openserver support

cde/programs/dtmail/dtmail/AttachArea.C

@@ -47,9 +47,6 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>
-#if defined(USL)
-#define S_ISSOCK(mode) ((mode & S_IFMT) == S_IFSOCK)
-#endif
 #include <stdio.h>
 #include <Dt/Editor.h>
 #include <Xm/ColorObjP.h>

cde/programs/dtmail/dtmail/AttachCmds.C

@@ -47,9 +47,6 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
-#if defined(USL)
-#define S_ISSOCK(mode) ((mode & S_IFMT) == S_IFSOCK)
-#endif
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <unistd.h>

cde/programs/dtmail/dtmail/DmxMessage.C

@@ -74,11 +74,7 @@
 // For CHARSET
 #include <LocaleXlate.h>
 #include <locale.h>
-#if !defined(USL)
 #include <strings.h>
-#else 
-#include <EUSCompat.h>
-#endif 
 
 #include "Application.h"
 #include "DtMail/DtMail.hh"

cde/programs/dtmail/dtmail/MsgHndArray.hh

@@ -45,12 +45,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#if defined(USL) && (OSMAJORVERSION == 2)
-extern "C" {
-#endif
-#if defined(USL) && (OSMAJORVERSION == 2)
-};
-#endif
 #include <DtMail/DtMail.hh>
 
 class MsgStruct {

cde/programs/dtmail/dtmail/RoamApp.C

@@ -70,9 +70,9 @@
 
 #include <unistd.h>
 #include <wchar.h>
-#if defined(USL) || defined(linux) || defined(CSRG_BASED)
+#if defined(linux) || defined(CSRG_BASED)
 #define wcswcs wcsstr
-#include <wctype.h>  // iswspace is defined in this header on USL */
+#include <wctype.h>
 #endif
 
 #ifdef DTMAIL_TOOLTALK
@@ -957,7 +957,7 @@ Usage(char *progname)
 
 nl_catd DT_catd = (nl_catd) -1;    // catgets file descriptor
 
-#if defined(reallyoldsun) || defined(USL)
+#if defined(reallyoldsun)
 #define SA_HANDLER_TYPE void (*)(void)
 #else
 #define SA_HANDLER_TYPE void (*)(int)

cde/programs/dtmail/dtmail/RoamMenuWindow.C

@@ -72,9 +72,7 @@
 #include <unistd.h>
 #include <sys/param.h>
 
-#if !defined(USL)
 #include <strings.h>
-#endif
 #include <errno.h>
 #include <unistd.h>
 #include <sys/utsname.h>