Bug#759791: Mention if parec is the same as parecord

[積丹尼 Dan Jacobson]

Package: pulseaudio-utils
Version: 5.0-6
Severity: wishlist
File: /usr/share/man/man1/pacat.1.gz

Mention if parec is the same as parecord, and maybe pamon too.

Anyway, there are several aliases that seem to map to only two or three
different things. Make sure they are all explicitly mapped out at the
top of the man page please.