Add documentation for --dracut-arg to lorax.1

And update documentation for lorax-composer. Make it clear that to pass
the arguments you must single quote them. Like so:

--dracut-arg='--xz'

And that all dracut args must be passed, since it overrides the
defaults.

Related: rhbz#1452220

docs/man/livemedia-creator.1

@@ -1,4 +1,4 @@
-.TH LIVEMEDIA-CREATOR 1 2013\-07\-26
+.TH LIVEMEDIA-CREATOR 1 2018\-08\-14
 .SH NAME
 livemedia-creator \- Create live install media
 
@@ -235,8 +235,9 @@ firmware files need to be installed manually, they are not shipped with RHEL.
 
 .SH DRACUT ARGUMENTS:
 .TP
-\fB\-\-dracut\-arg DRACUT_ARGS\fR
+\fB\-\-dracut-arg='ARG'\fR
-Argument to pass to dracut when rebuilding the initramfs. Pass this once foreach argument. NOTE: this overrides the default.
+Argument to pass to dracut when rebuilding the initramfs. Pass this once for each argument, single quoting
+the arguments like this: '--xz' NOTE: this overrides the default, so all dracut arguments must be included.
 
 .SH "SEE ALSO"
 Documentation in /usr/share/docs/lorax/README.livemedia-creator

docs/man/lorax.1

@@ -1,4 +1,4 @@
-.TH LORAX 1 2013\-07\-26
+.TH LORAX 1 2018\-08\-14
 .SH NAME
 lorax \- Create installer boot iso
 
@@ -97,6 +97,12 @@ Top level temporary directory
 \fB\-\-noverifyssl\fR
 This disables SSL certificate checking. eg. to allow using https: sources with self-signed certificates.
 
+.SH DRACUT ARGUMENTS:
+.TP
+\fB\-\-dracut-arg='ARG'\fR
+Argument to pass to dracut when rebuilding the initramfs. Pass this once for each argument, single quoting
+the arguments like this: '--xz' NOTE: this overrides the default, so all dracut arguments must be included.
+
 .SH AUTHORS
 .nf
 Martin Gracik