msi: Refactor to allow custom packages
c6a5b98b2c2c
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Description

msi: Refactor to allow custom packages

* configure.ac: New package "gnupg-msi" to allow version independet
  packaging.
* m4/gpg4win.m4 (GPG4WIN_BPKG_MSISRC): New macro for including
wixlibs.
* po/gpg4win-de.wxl, po/gpg4win-en.wxl: New strings.
* src/Makefile.am (stamps/stamp-msi-base): New.
* playground/install/gpg4win-$(VERSION).wixlib,
gpg4win-$(VERSION).wxs: Moved around and modified.
* src/WixUI_Gpg4win: Start some layout experiments.
* src/gpg4win.mk.in (SETVARS_WINE, SETVARS_WINE_TWO_DOLLAR)
(MSI_template): New templates to generate MSI targets.
* stamps/stamp-versions-all-signed: Target to sign
VERSION files.
* src/make-msi.pl: Generate wxs files for customized
configuration.

This enables the Gpg4win repo to create custom MSI packages
that contain a specific configuration, trusted root ca's etc.
and which might even contain a different GnuPG version as
we plan to branch between Gpg4win that contains GnuPG 2.3
and GnuPG Desktop which due to delays in evaluation etc. will
be more conservative and contain the GnuPG stable 2.2 branch.