How make "pkg_add" auto-choose some package version for me when same package is available in more versions?

[Tinker]

At least on 5.8, neither -z nor -I do it, and those are the only 
arguments that give any hint of containing such a feature 
(http://man.openbsd.org/OpenBSD-current/man1/pkg_add.1).

Is this feature supposed to be included in "pkg_add" or is a user(me) 
refered to implement some own script?

Sometimes you just want a package and don't care about which version it 
is.

Thanks!



# pkg_add -z squid
quirks-2.114 signed on 2015-08-09T11:57:52Z
Ambiguous: choose package for squid
a       0: <None>
        1: squid-3.4.13p0
        2: squid-3.5.6
Your choice:


# pkg_add -I squid
quirks-2.114 signed on 2015-08-09T11:57:52Z
Ambiguous: squid could be squid-3.4.13p0 squid-3.5.6


# pkg_add -I -z squid
quirks-2.114 signed on 2015-08-09T11:57:52Z
Ambiguous: squid could be squid-3.5.6 squid-3.4.13p0

# pkg_add -I "squid*"
quirks-2.114 signed on 2015-08-09T11:57:52Z
Can't find squid*