first AIO installer review

[GitMensch]

Rechecked https://get-superbol.com/software/gnucobol-windows-installer/; next to older packages there is now an AIO package with a reasonable details info. [and this seems to be hosted here]
The binaries were built by someone named David, so maybe @ddeclerck; but the scripts/configs for the installer and the new additional tool gc-onfig (adjusting environment variables) are still not available.

Nonetheless I take the option to say that the AIO works quite good, also as a silent msi install.
I'd like to know what "gcobc" is and how the additional gdb.exe (also including python support) compare to gdborig.exe

In any case I suggest to:

• allow gc-config to operate either GLOBAL or CURRENT USER
• allow user installs (not write to global environment vars, install under %LOCALAPPDATA%\Programs per default)
• add a "GnuCOBOL command prompt" to the start menu shortcuts (it may just opens cmd.exe and executes cobcrun --verbose --version; in general similar what cobenv.cmd is doing
• add an option to place this shortcut on the desktop (additional)
• add option to install documentation locally (I think the compressed static HTML output should be small, if not this could be another installer
• add an option to not install GixSQL
• add an option to not create any startmenu shortcuts
• add an option to install only the runtime (= no cobc/gcc/gdb/gixpp/gixsql, no dialect configs)
• document how the options may be used for silent installs
• provide an option to not tinker with the environment (in the easiest way that would need a cobenv.cmd as shipped with Arnold's / MSYS2 that would be started first; it could additionally check a file in %LOCALAPPDATA% - which may be written by gc-config - that contains the GCC compiler to use and adjusts the environment variables for the running session)

Originally posted by @GitMensch in OCamlPro/gnucobol#127 (comment)