mu: implement init, info commands

'init' is for the inital database setup

'info' is for gettting information about the mu database.

man/mu-info.1

@@ -0,0 +1,46 @@
+.TH MU-INFO 1 "February 2020" "User Manuals"
+
+.SH NAME
+
+mu info \- show information about the mu database
+
+.SH SYNOPSIS
+
+.B mu info [options]
+
+.SH DESCRIPTION
+
+\fBmu info\fR is the \fBmu\fR command for getting information about the mu
+database.
+
+.SH OPTIONS
+
+Note, some of the general options are described in the \fBmu(1)\fR man-page and
+not here, as they apply to multiple mu commands.
+
+.TP
+\fB\-\-muhome\fR
+use an alternative directory to store and read the database, write the logs,
+etc. By default, \fBmu\fR uses XDG Base Directory Specification (e.g. on Linux
+this defaults to \fI~/.cache/mu\fR, \fI~/.config/mu\fR). Earlier versions of
+\fBmu\fR defaulted to \fI~/.mu\fR, which now requires \fI\-\-muhome=~/.mu\fR.
+
+.SH RETURN VALUE
+
+\fBmu init\fR returns 0 upon successful completion, or a non-zero exit code if
+there was some error.
+
+.SH BUGS
+
+Please report bugs if you find them:
+.BR https://github.com/djcb/mu/issues
+
+.SH AUTHOR
+
+Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+
+.SH "SEE ALSO"
+
+.BR maildir (5),
+.BR mu (1),
+.BR mu-index (1)