zlib: sync with src

Drop RCS ids in upstream zlib source

We're not maintaining a this as a fork, it's upstream source with a handful
of patches. Thus, the RCS ids aren't particularly useful or important. They
are a bit

Drop RCS ids in upstream zlib source

We're not maintaining a this as a fork, it's upstream source with a handful
of patches. Thus, the RCS ids aren't particularly useful or important. They
are a bit of a maintenance burden and generate noise in diffs.

ok kn, no objection millert, "kill" guess who

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Sync sys libz with base

Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

Update libz to zlib 1.2.11 and reapply local patches as far as this
made sense.

Tested in snaps for a few days. deraadt helped with fitting things on
floppies and jmatthew found a bug I introduced.

ok deraadt

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Replace the cruddy old sys/net/zlib.[ch]. We now use the sys/lib/libz
code. Missing chunks of the API are imported from the libc version,
with a few #ifdef's to port it into the kernel environment.

Replace the cruddy old sys/net/zlib.[ch]. We now use the sys/lib/libz
code. Missing chunks of the API are imported from the libc version,
with a few #ifdef's to port it into the kernel environment.

The bootblocks already used the newer code, and should encounter no
surprises since there are so few changes to the existing files. In
the kernel, ipcomp and kernel ppp are changed to the new API.
ipcomp has been tested.

ok tedu the brave

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