bug#25717: 25.1.1; "erc-button-google-url" should not refer to a specific search engine

[Eli Zaretskii <eliz@gnu.org>]

unblock 24655 by 25717
thanks

> From: Andrew Robbins <contact@andrewrobbins.info>
> Date: Mon, 13 Feb 2017 23:29:32 -0500
> 
> The ERC variable "erc-button-google-url" should not refer to a
> specific search engine in its name and certainly not a
> privacy-disrespecting one at that in a GNU program[1].
> 
> I would suggest renaming the variable to something more generic
> such as "erc-button-web-search-url" or "erc-button-search-url"
> and changing the default value from
> "http://www.google.com/search?q=%s" to any of the following (or
> similar) at the developers' preference:
> 
> * "http://duckduckgo.com/?q=%s"
> * "http://www.startpage.com/do/search?cat=web&query=%s"
> * "http://www.ixquick.com/do/search?cat=web&query=%s"
> * "http://search.yacy.net/yacysearch/index.html?query=%s" (requires javascript)
> 
> [1] https://stallman.org/google.html

I have nothing against this suggestion, but I see no reason to block
the release of Emacs 26.1 due to it, especially since no one is
interested in fixing it.

Thanks.