add EDITMODE variable
(from PLD)

Index: pdksh-5.2.14/ksh.Man
===================================================================
--- pdksh-5.2.14.orig/ksh.Man	2009-09-16 23:24:45.000000000 +0200
+++ pdksh-5.2.14/ksh.Man	2009-09-16 23:24:49.000000000 +0200
@@ -791,13 +791,21 @@
 \fBselect\fP, \fBset \-o\fP and \fBkill \-l\fP commands
 to format information in columns.
 .\"}}}
+.\"{{{  EDITMODE
+.ksh(
+.IP \fBEDITMODE\fP
+If set, this parameter controls the command line editing mode for
+interactive shells.  If the last component of the path specified in this
+parameter contains the string \fBvi\fP, \fBemacs\fP or \fBgmacs\fP, the
+vi, emacs or gmacs (Gosling emacs) editing mode is enabled, respectively.
+.\"}}}
+.ksh)
 .\"{{{  EDITOR
 .ksh(
 .IP \fBEDITOR\fP
 If the \fBVISUAL\fP parameter is not set, this parameter controls the
 command line editing mode for interactive shells.
-See \fBVISUAL\fP parameter below for how this works.
-.ksh)
+See \fBEDITMODE\fP parameter above for how this works.
 .\"}}}
 .\"{{{  ENV
 .IP \fBENV\fP
@@ -1044,7 +1052,7 @@
 .\"{{{  VISUAL
 .ksh(
 .IP \fBVISUAL\fP
-If set, this parameter controls the command line editing mode for
+If set, and \fBEDITMODE\fP is unset, this parameter controls the command line editing mode for
 interactive shells.  If the last component of the path specified in this
 parameter contains the string \fBvi\fP, \fBemacs\fP or \fBgmacs\fP, the
 vi, emacs or gmacs (Gosling emacs) editing mode is enabled, respectively.
Index: pdksh-5.2.14/table.h
===================================================================
--- pdksh-5.2.14.orig/table.h	2009-09-16 23:24:45.000000000 +0200
+++ pdksh-5.2.14/table.h	2009-09-16 23:24:49.000000000 +0200
@@ -168,6 +168,7 @@
 #define V_TMOUT			15
 #define V_TMPDIR		16
 #define V_LINENO		17
+#define V_EDITMODE		18
 
 /* values for set_prompt() */
 #define PS1	0		/* command */
Index: pdksh-5.2.14/var.c
===================================================================
--- pdksh-5.2.14.orig/var.c	2009-09-16 23:24:45.000000000 +0200
+++ pdksh-5.2.14/var.c	2009-09-16 23:24:49.000000000 +0200
@@ -95,6 +95,7 @@
 #endif /* HISTORY */
 #ifdef EDIT
 			{ "EDITOR",		V_EDITOR },
+			{ "EDITMODE",		V_EDITMODE },
 			{ "VISUAL",		V_VISUAL },
 #endif /* EDIT */
 #ifdef KSH
@@ -111,7 +112,7 @@
 	int i;
 	struct tbl *tp;
 
-	tinit(&specials, APERM, 32); /* must be 2^n (currently 17 specials) */
+	tinit(&specials, APERM, 32); /* must be 2^n (currently 18 specials) */
 	for (i = 0; names[i].name; i++) {
 		tp = tenter(&specials, names[i].name, hash(names[i].name));
 		tp->flag = DEFINED|ISSET;
@@ -1017,11 +1018,15 @@
 #endif /* HISTORY */
 #ifdef EDIT
 	  case V_VISUAL:
-		set_editmode(str_val(vp));
+		if (!(global("EDITMODE")->flag & ISSET))
+			set_editmode(str_val(vp));
 		break;
 	  case V_EDITOR:
-		if (!(global("VISUAL")->flag & ISSET))
-			set_editmode(str_val(vp));
+		if (!(global("EDITMODE")->flag & ISSET))
+			if(!(global("VISUAL")->flag & ISSET))
+				set_editmode(str_val(vp));
+	  case V_EDITMODE:
+		set_editmode(str_val(vp));
 		break;
 	  case V_COLUMNS:
 		if ((x_cols = intval(vp)) <= MIN_COLS)