Update #ifdefs for Solaris to use correct groff options to get readable
output instead of raw PostScript output for man pages, and put the rest
of the groff utilities (tbl, pic, etc.) ahead of the SVR4 ones in $PATH.

--- a/main.c	Thu Mar 19 08:16:44 2015
+++ b/main.c	Thu Mar 19 08:17:07 2015
@@ -152,6 +152,18 @@
     saved_argv = (char **) XtMalloc(argc * sizeof(char *));
     bcopy(argv, saved_argv, argc * sizeof(char *));
 
+#ifdef sun /* force use of groff tools vs. SVR4 nroff tools */
+    {
+       const char *orig_path = getenv("PATH");
+       char *new_path;
+
+       if (asprintf(&new_path, "PATH=/usr/gnu/bin:%s",
+                    orig_path ? orig_path : "/usr/bin") != -1) {
+           putenv(new_path);
+       }
+    }
+#endif
+
     XtSetLanguageProc(NULL, (XtLanguageProc) NULL, NULL);
 
     initial_widget = XtAppInitialize(&app_con, "Xman", xman_options,
--- a/vendor.h	Thu Mar 19 08:17:24 2015
+++ b/vendor.h	Thu Mar 19 08:18:44 2015
@@ -159,7 +159,7 @@
 # define REFER		"refer"
 # if defined(CSRG_BASED)
 #  define FORMAT	"nroff -mandoc"
-# elif defined(linux) || defined(__CYGWIN__)
+# elif defined(linux) || defined(__CYGWIN__) || defined(sun)
 #  define FORMAT	"GROFF_NO_SGR= groff -Tlatin1 -mandoc"
 # elif defined(__DARWIN__)
 #  define FORMAT	"nroff -man"