Many of the external links found in the notmuch source can be resolved
using https instead of http. This changeset addresses as many as i
could find, without touching the e-mail corpus or expected outputs
found in tests.
... in addition to doing this when these variables are unset.
It is more useful to use defaults (emacs or emacsclient) than empty
string as a command name.
Before this change with --auto-daemon but without --create-frame
emacs server was started but no clients stay connected to it
(in both graphical and terminal displays).
Note that this changes how --client --auto-daemon works on
graphical display; New emacs frame is now created for the
message (and message-exit-actions hook appended).
Make the default behaviour for --client the same as emacsclient
default: do not create a new frame. Add a new option --create-frame,
passing the same option to emacsclient to create a frame.
Automatically starting Emacs in daemon mode if the Emacs server is not
running is a matter of preference better not hard coded in
notmuch-emacs-mua. Add an option to control the behaviour.
Use the printf -v convention to give output variable as argument
to escape () function so no subshell needs to be executed for
escaping input. The '-v' option to escape () is just syntactic
sugar for better understanding.
Also, backslash is now escaped with another backslash for emacs. This
ie especially important at the end of string.
`echo` is no longer used to write escaped output -- it might interpret
the escapes itself.
Notmuch uses long options exclusively all around. The short options in
notmuch-emacs-mua are intentionally just a compatible subset of
mutt(1). Keep it this way, if only to make documenting the fact easy!
The Notmuch style --client long option remains, of course.
