add -C/--colors: dumps all available colors

added long options --help and --version

don't let the net process stick around flush the net ibuf too

use a lockfile to prevent multiple instance of telescope

move defaults.c decls. to their own header

completing_read: take tab pointer instead of id

move pages decl. to their own header

flush imsg buffer before quitting this ensures that all the pending messages, such as the two IMSG_QUIT, but limiting to them, are actually sent. This unbreaks save_session too.

refactor: all imsgs are completely asynchronous

(process) network -> net rename

move ui decl. to ui.h

move parser declarations so parser.h

fix certificate mismatch after load_previous_page and proxy load_previous_page calls directly do_load_url, where the proxy reset happens in load_url.

initialize tabshead and proxylist early after the re-exec diff, the configuration gets loaded *before* and then the proxy list is initialized. Thus once we start the UI the proxy list is always empty. Solve the headaches by using TAILQ_HEAD_INITIALIZER. Or, in theory we could also avoid the initialization at all, since globals vars should be zeroed.

re-exec the children processes This way, they get their own new random address space.