Sort bibliography by last name

[ludopulles]

Slightly modify alphaurl such that it sorts by last name, by moving von-prefix between firstname and lineage in the sorting order, basing the sorting format on the style "din1505/alphadin.bst"

Note: an example where this sorting is relevant is e.g. the paper Communication-Efficient Multi-Party Computation for RMS Programs (Volume 1 Issue 2), where a paper by Rafaël del Pino, [dPLS19] is sorted at "d", whereas it should have been sorted at "P".

[jwbos]

Thanks for this contribution! We are currently discussing if we want to incorporate this pull requests (and if so, when). We come back soon with a decision.

[ludopulles]

To add more context, Springer sorts the references by "lastname firstname[ Jr.]" (see line 1388 of splncs04.bst).
For example, see https://link.springer.com/chapter/10.1007/978-3-031-22318-1_5#Bib1 which puts del Pino et al. at number 27 between Maller and Pointcheval.

[jwbos]

An update: Indeed, your pull request changes / fixes the ordering of some surnames. This comes at a price of us needing to ship our own bst file. We will decide later if we want to go with this (or not) for Volume 2.