Log message:
archivers: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Could not be committed due to merge conflict:
devel/py-traitlets/distinfo

The following distfiles were unfetchable (note: some may be only fetched
conditionally):

./devel/pvs/distinfo pvs-3.2-solaris.tgz
./devel/eclipse/distinfo eclipse-sourceBuild-srcIncluded-3.0.1.zip

Log message:
devel: Remove SHA1 hashes for distfiles

Log message:
Add lua-vstruct-2.1.1:

VStruct is a Lua library to provide functions for manipulating binary
data, in particular for reading binary files or byte buffers into Lua
values and for writing Lua values back into files or buffers. Supported
data types include:

- signed and unsigned integers of arbitrary size
- fixed and floating point numbers
- fixed-size, length-prefixed, and null-terminated strings
- booleans and bitmasks
- bit-packed integers, booleans and bitmasks

In addition, the library supports seeking, alignment, and byte order
controls, repetition, grouping of data into tables, and named fields.