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Addresses GitHub issue #484.
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This can prevent bizarre failures if, for example, you've done a
configuration in the top-level source directory, leaving behind one
config.h file, and then do an out-of-tree build in another directory,
with different configuration options. This way, we always pick up the
same config.h, in the build directory.
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This change removes CVS keywords that express that the file belongs to
libpcap repository. All such keywords represented the revision and
timestamp by the end of 2008 or even older.
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Add some additional checks to bpf_validate(), from OpenBSD.
Use bpf_validate() in install_bpf_program(), so we validate programs
even when they're being processed by userland filters; we make
bpf_validate() not reject backward branches, as we use them for the
protochain operator.
For BPF, don't assume that, just because no_optimize was set, we have a
program that we can't hand to the kernel; the user of the application
might have specified no optimization (e.g., tcpdump with -O), or we
might have generated code to handle 802.11 headers (the optimizer can't
handle that code). Instead, try handing the filter to the kernel and,
if that fails, try it in userland.
Get rid of BPF_MAXINSNS - we don't have a limit on program size in
libpcap.
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warnings from newer versions of GCC.
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include it in these files, as they either include "pcap-int.h", which
includes <pcap.h>, or they include <pcap.h> directly.
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