Re: BBDB autodialing

[Barak A. Pearlmutter]

> Ideas and especially improvements welcome.

(defvar termuxing
        (string= (getenv "HOME") "/data/data/com.termux/files/home")
        "True if running under termux")

Bicycle shedding aside, it seems like it might be a good idea to use a
general-purpose mechanism for opening a URL like
mailto:address@hidden or https://www.example.com/ but with the phone
number. The appropriate format is given by
http://www.ietf.org/rfc/rfc3966.txt but basically for our purposes
they look like

tel:+1-212-555-2018

where the + and international dialing code are mandatory, and the '-'
characters are legal but "must be ignored."

This would also allow skype:joe_example or googlehangouts:whatever by
symmetry, and it would be up the the URI handling system to deal
appropriately; I know android has a mechanism that allows apps to
register themselves for various classes of URIs.

--Barak.