CheckHost(...) returns unexpected result on Windows when SPF record is split.

[cedar10bits]

On Windows, if SPF record is split, CheckHost(...) returns unexpected result.
For example, domain "example.test.local" has TXT record like below.

# dig example.test.local txt
;; ANSWER SECTION:
example.test.local.     0       IN      TXT     "v=spf1 ip4:1.2.3.4 " "~all"

If IP is 1.2.3.5 and domain is "example.test.local", CheckHost(...) returns "softfal" on Linux.
But on Windows, CheckHost(...) returns "neutral".

Related issue.
golang/go#21472

[cedar10bits]

On Windows, net.LookupTXT regards a TXT record with multiple strings as multiple records.
Unfortunately, net.LookupTXT won't be fixed (but maybe replaced by new other function in the future).
So, if domain name has a TXT record with multiple strings, CheckHost may return unexpected result, like neutral or so.