Updates to pfsync.4

[timmoore88_gmail.com]

Summary

This first patch removes the passive voice from the existing phrase "For example, if firewall B is the backup, the carp1 configuration will appear like this:". Subsequent patch will address any igor issues.

[dru]

glebius@ pointed out that this man page needs a thorough review:

This can be improved more. There is no carp1 in FreeBSD. It is remnant of OpenBSD text, where they have pseudo interfaces for carp(4). The command line is already fixed for sis1, but the text is not.

[timmoore88_gmail.com]

Ok, I'll look into it at the next opportunity.

[timmoore88_gmail.com]

Glebius: I read through pfsync.4 and did not see any more references to carp1 other than the one already removed, though I'm not very familiar with this material. Is there anything else I am missing?