do not fail if there is no ipv6
userspace/libsinsp/filter: make next_operand return vector<char>

Modify sinsp_filter::next_operand to handle operand which contains
the NUL terminator.
userspace/libsinsp/filter*: modify parse_filter_value to accept len

When the filter value is binary, we need to pass the length of the
value.
userspace/libsinsp/filter*: extend rawval_to_string to accept PT_BYTEBUF
userspace/libsinsp/filter*: evt.buffer return raw_value when m_is_compare
userspace/libsinsp/filterchecks: some refactoring
userspace/libsinsp/filter*: transform evt.buffer in PT_BYTEBUF
userspace/libsinsp: remove old code
allow building with the system LuaJIT instead of the bundled one

now we can build with the LuaJIT of the system by passing
 -DUSE_BUNDLED_LUAJIT=OFF
or even use an own LuaJIT with
 -DUSE_BUNDLED_LUAJIT=OFF -DLUAJIT_PREFIX=/opt/superluajit

for backwards compatibility, build the bundled version by default
driver: ppm_ringbuffer.h: fix up structure types

This fixes the rest of the fields in the exported structure to use the
correct kernel types.
driver: fix up more types

This fixes up the types used in val_to_ring()
driver/ppm_fillers.c: removed unneeded {}

This fixes up all of the:
  WARNING: braces {} are not necessary for single statement blocks
issues in this file.
Merge pull request #69 from evgeni/system-luajit

allow building with the system LuaJIT instead of the bundled one. fixes #63
Provide a 'install_driver" target that just calls 'make install' inside the driver directory. Documented on wiki. fixes #31
allow building with the system jsoncpp instead of the bundled one

now we can build with the jsoncpp of the system by passing
 -DUSE_BUNDLED_JSONCPP=OFF
or even use an own jsoncpp with
 -DUSE_BUNDLED_JSONCPP=OFF -DJSONCPP_PREFIX=/opt/superjson

for backwards compatibility, build the bundled version by default
Use asm/atomic.h before 2.6.37
fix compiler error
Merge pull request #70 from gregkh/kernel_code_style

More kernel coding style fixups
Merge pull request #72 from evgeni/system-jsoncpp

allow building with the system jsoncpp instead of the bundled one
output formatting fields can now include a size. E.g. %20fd.name will pad (or truncate) the field to 20 characters.