Multiple configfile-related changes
- Print current configfile in the output of 'env' (this also makes configfile changeable in runtime via 'setenv')
- In 'configfile' commands, print which config file is being used
- Fix behavior of existing 'more_conf'
- Make load_config() return filename and hash, rather than unconditionally overwrite $conf
- Bring back %conf2 into implementation of save_config; it is necessary to be there or 'configfile' is getting lost/deleted in the runtime config
Other changes
- Add 'set' as alias for 'setenv'
- Add unsetenv/unset (opposite of setenv/set)
- Do not print unset/undefined values in 'env'
Adam Spiers <adam@spiers.net>
Andr Goens <andres.goens@tu-dresden.de>
Alexander Perlis <aperlis@math.lsu.edu>
Dennis Kaarsemaker <dennis.kaarsemaker@booking.com>
Emile "iMil" Heitor <imil@home.imil.net>
Gertjan Halkes <shelldap@ghalkes.nl>
Giacomo Tenaglia <Giacomo.Tenaglia@cern.ch>
Jonathan Rozes <jonathan@laika.com>
Josef Wells <Josefwells@alumni.utexas.net>
Landry Breuil <landry@openbsd.org>
Lars Täuber <taeuber@bbaw.de>
Michael Granger <ged@faeriemud.org>
Michael Raitza <spacefrogg-devel@meterriblecrew.net>
Mike Hix <m@hix.io>
Peter Marschall <peter@adpm.de>
Rick H. <rickh_shelldap@printstring.com>
Rong-En Fan <rafan@FreeBSD.org>
Salvatore Bonaccorso <carnil@debian.org>
Yann Cezard <yann.cezard@univ-pau.fr>