dg_loada 1.4.3 (#576)

Add Data General Dump_II file restore utility.

* Library for SimH Standard magnetic tape images

Simh_tape is an Ada package for handling magnetic tape images in the
[standard format](http://simh.trailing-edge.com/docs/simh_magtape.pdf) used by 
[SimH](http://simh.trailing-edge.com/) and many other computer simulators and emulators.

* Remove build-switches

* Fix alire.toml

* Delete simh_tapes-0.1.1-dev.toml

* Add Data General Dump_II file restore utility.

* Restrict to non-Windows OSes

Co-authored-by: Alejandro R Mosteo <amosteo@unizar.es>

index/dg/dg_loada/dg_loada-1.4.3.toml

@@ -0,0 +1,23 @@
+name = "dg_loada"
+description = "dg_loada loads (restores) legacy DG AOS/VS DUMP_II files"
+long-description = "dg_loada loads (restores) backup files created by Data General's AOS/VS DUMP_II, and maybe DUMP_III, files on any modern system supported by GNAT Ada."
+
+version = "1.4.3"
+
+authors = ["Stephen Merrony"]
+maintainers = ["Stephen Merrony <merrony@gmail.com>"]
+maintainers-logins = ["SMerrony"]
+
+licenses = "MIT"
+website = "https://github.com/SMerrony/dg_loada"
+tags = ["legacy", "recovering-data", "dg", "data-general", "aos-vs"]
+
+executables = ["dg_loada"]
+
+[available.'case(os)']
+windows = false
+'...'   = true
+[origin]
+commit = "1f0e0a89a1f6a08b194e60369df16537cd8c8301"
+url = "git+https://github.com/SMerrony/dg_loada.git"
+