Log Message:
ugrep: updated to 4.3.4

ugrep v4.3.4

the ug command no longer quits with an error message when no default .ugrep \ 
config file was found
bzip3 is supported but not required to build ugrep; to use bzip3 with ugrep, \ 
execute ./build.sh --with-bzip3.
fix the output of + separators by no longer using them for GNU grep compatibility
fix option -v with -ABC context
fix configuration file option arguments that may got lost and causes option \ 
argument errors in some cases after parsing a config file, such as colors=
allow config file importing in config files using config=FILE (but does not \ 
permit recursive imports)
add Dockerfile-minimized
minor usability improvements