libnpf fix: link the library itself to libnv; libnpf users should not be
expected to assume this dependency.

branches: 1.6.2;
NPF: Major rework -- migrate NPF to the libnv library.
- This conversion significantly simplifies the code and moves NPF to
a binary serialisation format (replacing the XML-like format).
- Fix some memory/reference leaks and possibly use-after-free bugs.
- Bump NPF_VERSION as this change makes libnpf incompatible with the
previous versions. Also, different serialisation format means NPF
connection/config saving and loading is not compatible with the
previous versions either.

Thanks to christos@ for extra testing.

branches: 1.5.12; 1.5.14;
add man page, lint cleanups.

branches: 1.4.2;
Add log validation

flesh this out more.

Add some flesh.

Add some very preliminary npfd(8) code.

Fix tcpdump example from "‐i npflog0.pcap" to "‐i npflog0"

branches: 1.6.2;
remove commented reference to pflog

Simplify the description of npfd, default npflog interface & pcap file are
covered later.
Move advise regarding offline analysis to the CAVEATS section.

Escape ellipsis to stop it being interpreted as a macro.
Drop commented out manual which doesn't exist.

branches: 1.3.4; 1.3.14; 1.3.16;
Whitespace, fix xref, remove unnecessary macro, sort SEE ALSO.

add example.

add man page, lint cleanups.

Treat EOF as a condition to re-open the pcap socket. Since we've been woken
up by poll(2), there must be data to read. If there is not, our socket might
not be ok anymore.

try to re-open the pcap connection on error.

output every 5 seconds instead of 60 or every 100 packets

branches: 1.6.2;
add man page, lint cleanups.

branches: 1.5.2;
Add log validation

flesh this out more.

starts running

Add some flesh.

Add some very preliminary npfd(8) code.

try to re-open the pcap connection on error.

branches: 1.4.2;
Add log validation

flesh this out more.

Add some flesh.

Add some very preliminary npfd(8) code.

Handle warnings and errors from pcap_activate properly (from bch)

check for snprintf() truncation and fail sanely if so, rather than
attempting to use a file that won't exist or isn't secure.

branches: 1.12.4;
Add a message when we are re-opening the pcap socket.

try to re-open the pcap connection on error.

can't call pcap_datalink before activate.

fix signed compare

branches: 1.8.2;
add man page, lint cleanups.

restrict permissions on log file

branches: 1.6.2;
Add log validation

set the timeout to 1 second so we can see packets flowing in real time.

flesh this out more.

starts running

Add some flesh.

Add some very preliminary npfd(8) code.