Add \kB for ctrl-backspace to lesskey.

Change lesskey man page to use a table for the \k codes.

lesskey.nro.VER

@@ -66,46 +66,33 @@ A backslash followed by one to three octal digits may be used to
 specify a character by its octal value.
 A backslash followed by certain characters specifies input
 characters as follows:
-.IP \eb
-BACKSPACE
-.IP \ee
-ESCAPE
-.IP \en
-NEWLINE
-.IP \er
-RETURN
-.IP \et
-TAB
-.IP \eku
-UP ARROW
-.IP \ekd
-DOWN ARROW
-.IP \ekr
-RIGHT ARROW
-.IP \ekl
-LEFT ARROW
-.IP \ek>
-ctrl-RIGHT ARROW
-.IP \ek<
-ctrl-LEFT ARROW
-.IP \ekU
-PAGE UP
-.IP \ekD
-PAGE DOWN
-.IP \ekh
-HOME
-.IP \eke
-END
-.IP \ekx
-DELETE
-.IP \ekX
-ctrl-DELETE
-.IP \eki
-INSERT
-.IP \ekt
-BACKTAB
-.IP \ek1
-F1
+.RS 5m
+.TS
+l l.
+\eb BACKSPACE (that is, 0x08)
+\ee ESCAPE
+\en NEWLINE
+\er RETURN
+\et TAB
+\ekb BACKSPACE (that is, the char(s) produced when the BACKSPACE key is pressed)
+\ekB ctrl-BACKSPACE
+\ekd DOWN ARROW
+\ekD PAGE DOWN
+\eke END
+\ekh HOME
+\eki INSERT
+\ekl LEFT ARROW
+\ekr RIGHT ARROW
+\ekt BACKTAB
+\eku UP ARROW
+\ekU PAGE UP
+\ekx DELETE
+\ekX ctrl-DELETE
+\ek> ctrl-RIGHT ARROW
+\ek< ctrl-LEFT ARROW
+\ek1 F1
+.TE
+
 .PP
 A backslash followed by any other character indicates that character is
 to be taken literally.

lesskey_parse.c

@@ -217,6 +217,7 @@ tstr(pp, xlate)
  switch (*++p)
  {
  case 'b': ch = SK_BACKSPACE; break;
+ case 'B': ch = SK_CTL_BACKSPACE; break;
  case 'd': ch = SK_DOWN_ARROW; break;
  case 'D': ch = SK_PAGE_DOWN; break;
  case 'e': ch = SK_END; break;