Backport commit a8caa6690 from Emacs

* doc/org-manual.org (Link Abbreviations):
* lisp/org/ol.el (org-link-shell-confirm-function)
(org-link-elisp-confirm-function):
* lisp/org/org.el (org-highlight-links): Avoid recommending Google.

Avoid recommending Google
a8caa66906b157c9c2b4c4dc1c447b6a9e747c5e
Stefan Kangas
Thu Jan 28 19:36:12 2021 +0100

doc/org-manual.org

@@ -3537,7 +3537,7 @@ the link.  Such a function will be called with the tag as the only
 argument.
 
 With the above setting, you could link to a specific bug with
-=[[bugzilla:129]]=, search the web for =OrgMode= with =[[google:OrgMode]]=,
+=[[bugzilla:129]]=, search the web for =OrgMode= with =[[duckduckgo:OrgMode]]=,
 show the map location of the Free Software Foundation =[[gmap:51
 Franklin Street, Boston]]= or of Carsten office =[[omap:Science Park 904,
 Amsterdam, The Netherlands]]= and find out what the Org author is doing
@@ -3549,7 +3549,7 @@ can define them in the file with
 #+cindex: @samp{LINK}, keyword
 #+begin_example
 ,#+LINK: bugzilla  http://10.1.2.9/bugzilla/show_bug.cgi?id=
-,#+LINK: google    http://www.google.com/search?q=%s
+,#+LINK: duckduckgo https://duckduckgo.com/?q=%s
 #+end_example
 
 In-buffer completion (see [[*Completion]]) can be used after =[= to

lisp/ol.el

@@ -376,9 +376,9 @@ changes to the current buffer."
 
 Shell links can be dangerous: just think about a link
 
-     [[shell:rm -rf ~/*][Google Search]]
+     [[shell:rm -rf ~/*][Web Search]]
 
-This link would show up in your Org document as \"Google Search\",
+This link would show up in your Org document as \"Web Search\",
 but really it would remove your entire home directory.
 Therefore we advise against setting this variable to nil.
 Just change it to `y-or-n-p' if you want to confirm with a
@@ -401,9 +401,9 @@ single keystroke rather than having to type \"yes\"."
   "Non-nil means ask for confirmation before executing Emacs Lisp links.
 Elisp links can be dangerous: just think about a link
 
-     [[elisp:(shell-command \"rm -rf ~/*\")][Google Search]]
+     [[elisp:(shell-command \"rm -rf ~/*\")][Web Search]]
 
-This link would show up in your Org document as \"Google Search\",
+This link would show up in your Org document as \"Web Search\",
 but really it would remove your entire home directory.
 Therefore we advise against setting this variable to nil.
 Just change it to `y-or-n-p' if you want to confirm with a

lisp/org.el

@@ -1846,7 +1846,7 @@ link types.  The types are:
 bracket   The recommended [[link][description]] or [[link]] links with hiding.
 angle     Links in angular brackets that may contain whitespace like
           <bbdb:Carsten Dominik>.
-plain     Plain links in normal text, no whitespace, like http://google.com.
+plain     Plain links in normal text, no whitespace, like https://gnu.org.
 radio     Text that is matched by a radio target, see manual for details.
 tag       Tag settings in a headline (link to tag search).
 date      Time stamps (link to calendar).