Audit use of lsh and fix glitches

I audited use of lsh in the Lisp source code, and fixed the
glitches that I found.  While I was at it, I replaced uses of lsh
with ash when either will do.  Replacement is OK when either
argument is known to be nonnegative, or when only the low-order
bits of the result matter, and is a (minor) win since ash is a bit
more solid than lsh nowadays, and is a bit faster.
* lisp/calc/calc-ext.el (math-check-fixnum):
Prefer most-positive-fixnum to (lsh -1 -1).
* lisp/vc/vc-hg.el (vc-hg-state-fast): When testing fixnum width,
prefer (zerop (ash most-positive-fixnum -32)) to (zerop (lsh -1
32)) (Bug#32485#11).
* lisp/emacs-lisp/bytecomp.el (byte-compile-lapcode):
Tighten sanity-check for bytecode overflow, by checking that the
result of (ash pc -8) is nonnegative.  Formerly this check was not
needed since lsh was used and the number overflowed differently.
* lisp/net/dns.el (dns-write): Fix some obvious sign typos in
shift counts.  Evidently this part of the code has never been
exercised.
* lisp/progmodes/hideif.el (hif-shiftleft, hif-shiftright):
* lisp/term/common-win.el (x-setup-function-keys):
Simplify.
* admin/unidata/unidata-gen.el, admin/unidata/uvs.el:
* doc/lispref/keymaps.texi, doc/lispref/syntax.texi:
* doc/misc/calc.texi, doc/misc/cl.texi, etc/NEWS.19:
* lisp/arc-mode.el, lisp/calc/calc-bin.el, lisp/calc/calc-comb.el:
* lisp/calc/calc-ext.el, lisp/calc/calc-math.el:
* lisp/cedet/semantic/wisent/comp.el, lisp/composite.el:
* lisp/disp-table.el, lisp/dos-fns.el, lisp/edmacro.el:
* lisp/emacs-lisp/bindat.el, lisp/emacs-lisp/byte-opt.el:
* lisp/emacs-lisp/bytecomp.el, lisp/emacs-lisp/cl-extra.el:
* lisp/erc/erc-dcc.el, lisp/facemenu.el, lisp/gnus/message.el:
* lisp/gnus/nndoc.el, lisp/gnus/nnmaildir.el, lisp/image.el:
* lisp/international/ccl.el, lisp/international/fontset.el:
* lisp/international/mule-cmds.el, lisp/international/mule.el:
* lisp/json.el, lisp/mail/binhex.el, lisp/mail/rmail.el:
* lisp/mail/uudecode.el, lisp/md4.el, lisp/net/dns.el:
* lisp/net/ntlm.el, lisp/net/sasl.el, lisp/net/socks.el:
* lisp/net/tramp.el, lisp/obsolete/levents.el:
* lisp/obsolete/pgg-parse.el, lisp/org/org.el:
* lisp/org/ox-publish.el, lisp/progmodes/cc-defs.el:
* lisp/progmodes/ebnf2ps.el, lisp/progmodes/hideif.el:
* lisp/ps-bdf.el, lisp/ps-print.el, lisp/simple.el:
* lisp/tar-mode.el, lisp/term/common-win.el:
* lisp/term/tty-colors.el, lisp/term/xterm.el, lisp/vc/vc-git.el:
* lisp/vc/vc-hg.el, lisp/x-dnd.el, test/src/data-tests.el:
Prefer ash to lsh when either will do.

admin/unidata/unidata-gen.el

@@ -401,7 +401,7 @@ Property value is a symbol `o' (Open), `c' (Close), or `n' (None)."
       (if (consp range)
 	  (if val
 	      (set-char-table-range table range val))
-	(let* ((start (lsh (lsh range -7) 7))
+	(let* ((start (ash (ash range -7) 7))
 	       (limit (+ start 127))
 	       first-index last-index)
 	  (fillarray vec 0)
@@ -548,7 +548,7 @@ Property value is a symbol `o' (Open), `c' (Close), or `n' (None)."
 		(if (< from (logand to #x1FFF80))
 		    (setq from (logand to #x1FFF80)))
 		(setq prev-range-data (cons (cons from to) val-code)))))
-	(let* ((start (lsh (lsh range -7) 7))
+	(let* ((start (ash (ash range -7) 7))
 	       (limit (+ start 127))
 	       str count new-val from to vcode)
 	  (fillarray vec (car default-value))
@@ -761,7 +761,7 @@ Property value is a symbol `o' (Open), `c' (Close), or `n' (None)."
    ((stringp val)
     (if (> (aref val 0) 0)
 	val
-      (let* ((first-char (lsh (lsh char -7) 7))
+      (let* ((first-char (ash (ash char -7) 7))
 	     (word-table (aref (char-table-extra-slot table 4) 0))
 	     (i 1)
 	     (len (length val))
@@ -865,7 +865,7 @@ Property value is a symbol `o' (Open), `c' (Close), or `n' (None)."
    ((stringp val)
     (if (> (aref val 0) 0)
 	val
-      (let* ((first-char (lsh (lsh char -7) 7))
+      (let* ((first-char (ash (ash char -7) 7))
 	     (word-table (char-table-extra-slot table 4))
 	     (i 1)
 	     (len (length val))
@@ -982,7 +982,7 @@ Property value is a symbol `o' (Open), `c' (Close), or `n' (None)."
 		(if slot
 		    (nconc slot (list range))
 		  (push (list val range) block-list))))
-	(let* ((start (lsh (lsh range -7) 7))
+	(let* ((start (ash (ash range -7) 7))
 	       (limit (+ start 127))
 	       (first tail)
 	       (vec (make-vector 128 nil))

admin/unidata/uvs.el

@@ -107,7 +107,7 @@ The most significant byte comes first."
   (let (result)
     (dotimes (i size)
       (push (logand value #xff) result)
-      (setq value (lsh value -8)))
+      (setq value (ash value -8)))
     result))
 
 (defun uvs-insert-fields-as-bytes (fields &rest values)