fork port check

every port check is done in a own process now
add namelookup option

uses the name (if available) from iplookup and checks it with a namelookup,
to see if the PTR and A dns entries are ok
add -c option

comma seperated output
can be used with the -c option
add the file option

 -f | --file + outputfilename
default is stdout
tidy up the code

adds function definition in header files
corrects syntax warning compiled with "-Wall"
changes print functions to "void" instead of "int"
removes varchk function, is in main now
adds the file option to help screen
fix output to stdout

fixes bug of prev. version
now it looks for "stdout" before it closes the file
add manpage

adds manpage in man dir
remove trailing whitespaces

implement fixed stringlen for output
e.g. printf("%s"); -> printf("%20s");
this is needed to avoid useless blanks on lineend
add no color option

-b | --nocolor
output is without colors
add json option

 -j | --json
output is in json format

and rewrote the print commands
and updated the manpage
correct color

ping was always green
lookup was always red
now it's depending on the status if it's red or green
add option for left and right side ouput

std. way should be the right side
with the -l, --left option you can bind the table to left side
corrects colorcode for port option
add makefile

add configure script to check if required commands available
add makefile to compile the and install netchk