Changes: update Calamares manpage

- fix broken URL
 - add a little description
 - add newer command-line flags

FIXES #1516

man/calamares.8

@@ -1,18 +1,19 @@
 .TH CALAMARES "8"
 .SH NAME
-calamares \- distribution-independent system installer 
+calamares \- distribution-independent system installer
 .SH SYNOPSIS
 .B calamares
 [\fI\,options\/\fR]
 .SH DESCRIPTION
 .B calamares
-is a distribution-independent system installer, with an advanced partitioning 
-feature for both manual and automated partitioning operations. It is the 
-first installer with an automated “Replace Partition” option, which makes it 
-easy to reuse a partition over and over for distribution testing. Calamares is 
-designed to be customizable by distribution maintainers without need for 
-cumbersome patching, thanks to third party branding and external modules 
+is a distribution-independent system installer, with an advanced partitioning
+feature for both manual and automated partitioning operations. It is the
+first installer with an automated “Replace Partition” option, which makes it
+easy to reuse a partition over and over for distribution testing. Calamares is
+designed to be customizable by distribution maintainers without need for
+cumbersome patching, thanks to third party branding and external modules
 support.
+
 .SH OPTIONS
 .TP
 \fB\-h\fR, \fB\-\-help\fR
@@ -22,16 +23,63 @@ Displays this help.
 Displays version information.
 .TP
 \fB\-d\fR, \fB\-\-debug\fR
-Verbose output for debugging purposes.
+Debugging mode for testing purposes. Implies \fB\-D8\fR and \fB\-c.\fR.
+.TP
+\fB\-D\fR <level>
+Sets logging-level. Higher numbers are more verbose.
 .TP
 \fB\-c\fR, \fB\-\-config\fR <config>
 Configuration directory to use, for testing purposes.
+.TP
+\fB\-X\fR, \fB\-\-xdg-config\fR
+Use XDG environment variables for file lookup.
+.TP
+\fB\-T\fR, \fB\-\-debug-translation\fR
+Use translations from current directory.
+
+.SH "FILES"
+
+.B calamares
+reads its configuration from many files.
+The first configuration file is
+.BI settings.conf
+which is located in one of the configuration locations.
+When started with \fB\-d\fR
+.B calamares
+looks in the current directory for a settings file.
+When started with \fB\-X\fR
+.B calamares
+looks in the directories specified by
+.BI XDG_CONFIG_DIRS
+for a settings file.
+If no settings file is found elsewhere,
+.B calamares
+looks in pre-configured directories like
+.BI /etc
+\fB\fR.
+
+The contents of the
+.BI settings.conf
+file dictate where other configuration files are located, and
+which configuration files are used.
+
 .SH "SEE ALSO"
 The
 .B calamares
 website: https://calamares.io
+\fB\fR.
+
+The command-line arguments for
+.B calamares
+are primarily for developers convenience and should not be needed
+in nearly any situation in which
+.B calamares
+is deployed. Most live CD environments and OEM installations should
+have installed configuration files in their correct system-wide locations.
+
 .SH "BUGS"
-Please report any bugs to https://calamares.io/issues
+Please report any bugs to https://github.com/calamares/calamares/issues
+
 .SH AUTHORS
 .B calamares
 is written by Teo Mrnjavac <teo@kde.org>,