What has changed in skalibs

in 2.1.0.0

unixmessage_drop added, part of unixmessage/skaclient hardening against fd leakage
unixmessage_sender_flush return code aligned with the convention in the rest of skalibs
unixmessage_sender_flush now handles short writes
skaclient_start(_async) prototype changed: now takes an option argument

The packaging system has completely changed.
Programs should now link with -lskarnet followed by the appropriate sysdeps links.
No compatibility is ensured. Most APIs haven't changed, but no guarantee is offered.
The most important change is probably the disparition of struct tai and struct taia, replaced with the tai_t and tain_t types. Attosecond precision has been removed - processor speed is almost capped now, and it looks like nanosecond precision will be enough for the foreseeable future.
Buffer implementation has changed, and some interfaces too, mainly the buffer_flush and bufalloc_flush return code.
skaclient, skalibs' client-server communication suite, has been entirely reimplemented: it's now using the new "unixmessage" set of primitives for easier fd-passing.