docs: mention in the FAQ how to change the escape sequences of urxvt

Replace an obsolete question that doesn't have a good answer: setting
TERM to vt100 is unlikely to make the more complicated keystrokes work,
which are the ones that are most likely not to work.

doc/faq.html

@@ -41,7 +41,7 @@
 <h3><a href="#4">4. Running</a></h3>
 <blockquote><p>
   <a href="#4.1">4.1. How do I open a file with a name beginning with '+' from the command line?</a><br>
-  <a href="#4.2">4.2. Ack! My Backspace/Delete/Enter/Meta/double bucky key doesn't seem to work! What can I do?</a><br>
+  <a href="#4.2">4.2. How can I make Ctrl+Shift+Left/Right select words on urxvt?</a><br>
   <a href="#4.3">4.3. Ack! My numeric keypad's keys don't work properly when NumLock is off! What can I do?</a><br>
   <a href="#4.4">4.4. With what keystroke can I paste text from the clipboard into nano?</a><br>
   <a href="#4.5">4.5. How do I select text for or paste text from the clipboard when nano's mouse support is turned on?</a><br>
@@ -182,10 +182,27 @@
   To open '+filename.txt' starting on line 1, column 20: <b>nano +,20 +filename.txt</b><br>
   To open '+filename.txt' starting on line 10, column 20: <b>nano +10,20 +filename.txt</b><br>
   To open '+filename.txt' starting on line 1 and 'filename.txt' starting on line 40: <b>nano +1 +filename.txt +40 filename.txt</b></p></blockquote>
-<h3><a name="4.2"></a>4.2. Ack! My Backspace/Delete/Enter/Meta/double bucky key doesn't seem to work! What can I do?</h3>
+<h3><a name="4.2"></a>4.2. How can I make Ctrl+Shift+Left/Right select words on urxvt?</h3>
-<blockquote><p>Try setting your $TERM variable to 'vt100'. nano doesn't yet support every term entry under the sun.</p>
+<blockquote><p>The urxvt terminal emulator produces non-standard escape sequences for the modified cursor keys.  These deviant sequences are not listed in the terminfo database, which means that ncurses does not recognize them.  The easiest way around this is to tell urxvt to produce xterm-compatible escape sequences for the relevant keystrokes.  To achieve this, add the following lines to your ~/.Xresources file:</p>
-  <p>Bourne shell users (bash and sh): <b>export TERM=vt100</b><br>
+<pre>
-  C Shell users (tcsh and csh): <b>setenv TERM vt100</b></p></blockquote>
+    URxvt.iso14755_52: False
+
+    URxvt.keysym.C-S-Up: \033[1;6A
+    URxvt.keysym.C-S-Down: \033[1;6B
+    URxvt.keysym.C-S-Right: \033[1;6C
+    URxvt.keysym.C-S-Left: \033[1;6D
+
+    URxvt.keysym.M-Up: \033[1;3A
+    URxvt.keysym.M-Down: \033[1;3B
+    URxvt.keysym.M-Right: \033[1;3C
+    URxvt.keysym.M-Left: \033[1;3D
+
+    URxvt.keysym.M-Insert: \033[2;3~
+    URxvt.keysym.M-Delete: \033[3;3~
+
+    URxvt.keysym.M-Page_Up: \033[5;3~
+    URxvt.keysym.M-Page_Down: \033[6;3~</pre>
+<p>Then run <b>xrdb ~/.Xresources</b> and restart your urxvt terminal.  Now <b>Ctrl+Shift+Left</b> and <b>Ctrl+Shift+Right</b> will select words, <b>Alt+Up</b> and <b>Alt+Down</b> will scroll the text without moving the cursor, and several such things more.</p></blockquote>
 <h3><a name="4.3"></a>4.3. Ack! My numeric keypad's keys don't work properly when NumLock is off! What can I do?</h3>
 <blockquote><p>You can use the <b>-K</b> or <b>--rawsequences</b> option on the command line, or add the line <b>set rawsequences</b> to your .nanorc. However, nano's mouse support will be disabled if you do any of these things.</p></blockquote>
 <h3><a name="4.4"></a>4.4. With what keystroke can I paste text from the clipboard into nano?</h3>