Merge pull request #65 from rohara/devel

Fix libnl/libnl-3 logic in configure script
libipvs: libnl-3 include fix

when libnl-3 is present use proper include path. On most system libnl-3
include path is /usr/include/libnl3.
lib: extend command lib string parser

Extend cmd_make_strvec to support quoted string as a single slot and
commented string at the end of parsed string.
lib: cosmetics at command.c

Extend command framework to support logger and remove some dead code.
some cosmetics too.