refactor of var name
refactor for run base dir
refactor config file

no longer use json file as config
history logs merged into a single conf
guard specified locale
more todo
sendmail moved to a seperate pkg
config pkg and unit tests
move
all conf fields are public
judge whether a parser is being used
add show all parsers option
todo
conf guard tells whether it uses a parser
config update
del mail.cf
parser.cf merged into main conf
create parser according to config
get parser by id
a big refactor