Document in ifconfig(8) that gre(4) also accepts tunnel commands

[feld]

Summary

ifconfig(8) fails to mention that gre(4) also accepts tunnel commands

[feld]

Try to remove the "specific to" wording which is misleading

[feld]

"IP tunnel" -> "GRE tunnel" in the GRE section

[feld]

"available for" is ... bad wording. I like "applicable to" much better.

[wblock]

sbin/ifconfig/ifconfig.8

2420

"The following" is almost always used wrongly, so replace with "These".
Also, this sentence is weirdly worded, using "interfaces" but only listing one. I'd guess that previous edits removed others.
So maybe:

These parameters are available for the
.Xr gif 4
IP tunnel interface:

2470

As above:

These parameters are available for the
.Xr gre 4
tunnel interface:

[wblock]

sbin/ifconfig/ifconfig.8

2420

"applicable to" is kind of roundabout wording. How about
s/are applicable to/apply to/

[feld]

Change wording

[feld]

I kept "The following parameters" because it's used about 20 times in this file. So unless we want to update the wording for every instance it seems out of place to change the pattern in these two places.

[wblock]

In D5667#187435, @feld wrote:

I kept "The following parameters" because it's used about 20 times in this file. So unless we want to update the wording for every instance it seems out of place to change the pattern in these two places.

It's not correct just because it is used a lot. Think of fixing it not as being inconsistent, but correcting two instances of bad code. And it's not necessary to fix everything. Think of it like a hiking trail, leave it better than you found it. If everyone did that, there would be little to fix.

That said, it's not worth holding up this nearly year-old patch. Please check with mandoc -Tlint and igor -R before commit. Thanks!