Handle <br> inside <dl>

[alkisg]

The following input (instead of <br>, two spaces can also be used):

**ADD_IMAGE_EXCLUDES**=*"/etc/ltsp/add-image.excludes"*<br>
**OMIT_IMAGE_EXCLUDES**=*"home/\*"*
:   Add or omit items to the `ltsp image` exclusion list.

gives a completely messed up output, with some parts missing and some other parts getting duplicated:

.TP
\fBOMIT_IMAGE_EXCLUDES\fP=\fI"home/*"\fP
Add or omit items to the \fB\fCltsp image\fR exclusion list.

.PP
Add or omit items to the \fB\fCltsp image\fR exclusion list.

To work around this, currently I'm using sed to change the initial markdown code to:

**ADD_IMAGE_EXCLUDES**=*"/etc/ltsp/add-image.excludes"*
:

**OMIT_IMAGE_EXCLUDES**=*"home/\*"*
:   Add or omit items to the `ltsp image` exclusion list.

With a bit of pre-processing and post-processing and special casing, go-md2man produces nice output! We'll switch to that again for ltsp.org, thank you!