doc: check-in IANA registration template for the "swh" URI scheme

Closes T1003

docs/iana-swh-template.txt

+(last updated 2020-04-28)
+
+Scheme name: swh
+
+Status: Provisional
+
+Applications/protocols that use this scheme name:
+  Software Heritage: https://www.softwareheritage.org/
+  Software Package Data Exchange: https://spdx.org/
+  NTIA: https://www.ntia.doc.gov/SoftwareTransparency
+  Identifiers.org: http://identifiers.org/
+  Name-to-Thing (N2T): https://n2t.net/
+  HAL: https://hal.archives-ouvertes.fr/
+
+Contact: Stefano Zacchiroli <zack@upsilon.cc>
+
+Change controller: Software Heritage <info@softwareheritage.org>
+
+References:
+
+  Scheme specification: https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html
+
+  The Software Heritage project: https://www.softwareheritage.org/
+
+  The Software Heritage archive: https://archive.softwareheritage.org/
+
+  Publications:
+
+    Roberto Di Cosmo, Morane Gruenpeter, Stefano Zacchiroli. Referencing Source
+    Code Artifacts: a Separate Concern in Software Citation. In Computing in
+    Science and Engineering, volume 22, issue 2, pp. 33-43. ISSN 1521-9615,
+    IEEE. March 2020. DOI 10.1109/MCSE.2019.2963148
+
+    Roberto Di Cosmo, Morane Gruenpeter, Stefano Zacchiroli. Identifiers for
+    Digital Objects: the Case of Software Source Code Preservation. In
+    proceedings of iPRES 2018: 15th International Conference on Digital
+    Preservation. September 2018. 10.17605/OSF.IO/KDE56
+
+(file created 2020-04-28)