doc: properly escape non-hyphens

extensions/libxt_quota2.man

@@ -7,25 +7,25 @@ When counting down from the initial quota, the counter will stop at 0 and
 the match will return false, just like the original "quota" match. In growing
 (upcounting) mode, it will always return true.
 .TP
-\fB--grow\fP
+\fB\-\-grow\fP
 Count upwards instead of downwards.
 .TP
-\fB--name\fP \fIname\fP
+\fB\-\-name\fP \fIname\fP
 Assign the counter a specific name. This option must be present, as an empty
 name is not allowed. Names starting with a dot or names containing a slash are
 prohibited.
 .TP
-[\fB!\fP] \fB--quota\fP \fIiq\fP
+[\fB!\fP] \fB\-\-quota\fP \fIiq\fP
 Specify the initial quota for this counter. If the counter already exists,
 it is not reset. An "!" may be used to invert the result of the match. The
-negation has no effect when \fB--grow\fP is used.
+negation has no effect when \fB\-\-grow\fP is used.
 .TP
-\fB--packets\fP
+\fB\-\-packets\fP
 Count packets instead of bytes that passed the quota2 match.
 .PP
 Because counters in quota2 can be shared, you can combine them for various
 purposes, for example, a bytebucket filter that only lets as much traffic go
 out as has come in:
 .PP
--A INPUT -p tcp --dport 6881 -m quota --name bt --grow
--A OUTPUT -p tcp --sport 6881 -m quota --name bt
+\-A INPUT \-p tcp \-\-dport 6881 \-m quota \-\-name bt \-\-grow;
+\-A OUTPUT \-p tcp \-\-sport 6881 \-m quota \-\-name bt;