This implements the same behavior as it is used in the autoupdater [1].

This is for example required to allow the manual installation of
firmware upgrades via the config mode on devices which where migrated
from swconfig to DSA. Otherwise the image will always be invalid.

[1] https://github.com/freifunk-gluon/packages/commit/b80428166454d184f356e5a14a144911d9ee11aa

This was a remnant of LuCI that was never used in gluon-web.

Co-Authored-By: Matthias Schiffer <mschiffer@universe-factory.net>

This removes PKG_VERSION and PKG_RELEASE from most Makefiles, as the
value was never useful for Gluon packages; instead, PKG_VERSION is set
to 1 in gluon.mk.

It also removes two other weird definitions:

- gluon-iptables-clamp-mss-to-pmtu replicating the old PKG_VERSION logic
  from gluon-core, but without the fixed PKG_BUILD_DIR to prevent
  unnessary rebuilds
- gluon-hoodselector set GLUON_VERSION=3

[Matthias Schiffer: whitespace changes, error handling]

This fully abstracts VPN methods, making gluon-mesh-vpn-fastd and
gluon-mesh-vpn-tunneldigger completely self-contained.

Provide a LUA interface for generic interacting with VPN methods in
gluon-mesh-vpn-core and web packages.

This also adds the ability to install tunneldigger and fastd to the same
image, selecting the VPN method based on the selected domain.

Signed-off-by: David Bauer <mail@david-bauer.net>

The rudimentary flash size determination function expects the partition
for the devices firmware to be called "linux" while it is (since quite
some time) "firmware".

Fix this error to display available flash size as well as more useful
error message in case the uploaded firmware image exceeds the flash
space.

Signed-off-by: David Bauer <mail@david-bauer.net>

- CGI script and index.html are moved from gluon-web to
  gluon-config-mode-core, the script is renamed to 'config'
- gluon-web and gluon-web-model base views and i18n files are symlinked
  into the new path
- gluon-web-theme is renamed to gluon-config-mode-theme and installs
  directly into the new path
- all gluon-web-* models, controllers and views are moved into the new
  path

Also bring back gluon-web-theme's i18n strings.

exec() is moved to gluon.util.

Pretty much everything about this was broken:
* Fix dependency tracking
* Fix vertical orientation
* Fix paddings
* Add theming

In addition to significant internal differences in check_site_lib.lua (in
particular unifying error handling to a single place for the upcoming
multi-domain support), this changes the way fields are addressed in site
check scripts: rather than providing a string like 'next_node.ip6', the
path is passed as an array {'next_node', 'ip6'}.

Other changes in site check scripts:
* need_array and need_table now pass the full path to the sub fields to the
subcheck instead of the key and value
* Any check referring to a field inside a table implies that all higher
levels must be tables if they exist: a check for {'next_node', 'ip6'} adds
an implicit (optional) check for {'next_node'}, which allows to remove many
explicit checks for such tables

[Matthias schiffer: rebase, add a few more restrictions]

Some files have received some additional refactoring.

As PROVIDES can be used to replace real packages now, we don't need the
virtual packages as workaround anymore. This also means that the providing
packages don't need to be added to site.mk explicitly anymore when the
default provider is used.