Feature request: envvar to set title/message prefix/suffix

[josharian]

I run noti on multiple machines. I'd like to be able to set an envvar that sets a default title or message prefix or suffix to help disambiguate the source of the notifications. (There don't need to be four envvars in order to handle every title/message prefix/suffix combination; any one of them would do.) Then I could run noti -t foo but receive a message like foo (laptop). Thanks, and thanks for noti!

[phillipahereza]

@variadico could these prefix/suffix be added to the config file instead of the environment? cc @josharian