Documenting the --enable-altrcname configure option.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5590 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

 2016-01-25  Benno Schulenberg  <bensberg@justemail.net>
 	* src/files.c (update_poshistory): Handle an update of the first
 	element correctly.
+	* doc/texinfo/nano.texi: Document the --enable-altrcname option.
+	The lack of this was pointed out by Frank.
 
 2016-01-24  Benno Schulenberg  <bensberg@justemail.net>
 	* src/files.c (update_poshistory): Move an updated item to the end

doc/texinfo/nano.texi

@@ -1459,6 +1459,10 @@ Disable support for reading and writing Unicode files.  Normally the
 configure script auto-detects whether to enable UTF-8 support or not.
 You can use this or the previous option to override that detection.
 
+@item --enable-altrcname=@var{name}
+Use the file with the given @var{name} (in the user's home directory)
+as nano's settings file, instead of the default @code{.nanorc}.
+
 @item --with-slang
 Compile @code{nano} against Slang instead of against ncurses or other
 curses libraries.