simplify the fringe vline print_vline can handle a NULL .line, so I can avoid the long comment and the ugly cast.

change fringe defaults: always enabled and ~ as prefix

setup a fringe in the provided themes

tweak the about:new page

sync changelog

add fringe prefix and allow to override offset for fringes alone

sync changelog

document the `line.fringe' style identifier

add vi-like `~' fringes after the end of the buffers

meeeeuhteuhethuet

kill old, unused forward prototype for non-existant struct page

modeline: add an extra - after the trust status char in part for symmetry, and in part because it seems a good spot to add an indicator for the presence of a client certificate in the future.

specify that --help and --version also exit

remove the description about the session file format It's been changed recently (see history & killed files) and I don't want to keep documenting it: users shouldn't mess with their history file that easily (this is not an excuse for sloppy parsing, which isn't the case.) Furthermore, the format is easy, I think intuitive, and the code easily found in fs.c.

append killed tabs when parsing session to preserve the order The other option, less intrusive, would be to send the killed tabs in reverse order, but it'd seems strange when looking at the session file otherwise. So, add a `append' flag to kill_tab to optionally append the killed tab instead of pre-pending it.