Bring more proposal 220 sections in sync with implementation
Update proposal 228 to reflect implementation status
Note that we will be dropping the "protocol" lines sooner or later

(See ticket #13593)
Update proposal 220 voting process to be actually secure

This makes it mirror the existing voting process, and ensures that
the results are equivalent once everybody is updated.
Merge branch '220_evolution'

This branch reflects changes I've needed to make in proposals 220 and
228 to reflect what's sensible or implementable (as far as I've found
while implementing them).
Document what we mean by "PEM format".

Closes ticket 13042
Document more networkstatus parameters.

List the ones I don't know how to document.

Try to find the version in which each one first appeared.

Closes #12888