man: Remove italic bold formatting
asciidoctor is unable to correctly handle man page
output of *' (bold+italic) formatting.
For example output of *'daemon'* is converted to \fB\fIdaemon\fP\fP
what means "set bold font", "set italic font", daemon, "switch to
previous font", "switch to previous font". So the first \fP will first
switch to bold font and second \fP will again switch to italic font so
rest of paragraph is typed as italic.
asciidoc handles this situation a bit better, because of using
\fB\fIdaemon\fR\fR (\fR means "switch to roman (or regular) font").
Proposed solution is to remove *' and replace it just by italic font
(quote ').
Signed-off-by: Jan Friesse <jfriesse@redhat.com>