mless: prefer setting LESSKEYIN and .mlesskey

Fixes leahneukirchen#215.

man/mless.1

@@ -43,6 +43,14 @@ Use
 and
 .Sq Ic ":p"
 to read the next (resp. previous) message.
+.Sh FILES
+.Bl -tag -width Ds
+.It Pa ${MBLAZE:-$HOME/.mblaze}/mlesskey , Pa $HOME/.mlesskey
+Additional keybindings loaded for convenience.
+.It Pa ${MBLAZE:-$HOME/.mblaze}/mless , Pa $HOME/.mless
+Additional compiled keybindings loaded for convenience.
+(Only needed for less earlier than version 590.)
+.El
 .Sh EXIT STATUS
 .Ex -std
 .Sh SEE ALSO

mless

@@ -72,7 +72,13 @@ nl="
 "
 export MLESS_RAW=0
 export MLESS_HTML=0
-if [ -f "$MBLAZE/mless" ]; then
+if [ -f "$MBLAZE/mlesskey" ]; then
+	export LESSKEYIN="$MBLAZE/mlesskey"
+elif [ -f "$HOME/.mblaze/mlesskey" ]; then
+	export LESSKEYIN="$HOME/.mblaze/mlesskey"
+elif [ -f "$HOME/.mlesskey" ]; then
+	export LESSKEYIN="$HOME/.mlesskey"
+elif [ -f "$MBLAZE/mless" ]; then
 	export LESSKEY="$MBLAZE/mless"
 elif [ -f "$HOME/.mblaze/mless" ]; then
 	export LESSKEY="$HOME/.mblaze/mless"

mlesskey.example

@@ -1,5 +1,5 @@
 # mless(1) keybindings
-# to update: lesskey -o ~/.mless ~/.mlesskey
+# to update (only on less <590): lesskey -o ~/.mless ~/.mlesskey
 Q quit \1
 :cq quit \1
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