Order caps first

Merge in changes from OpenBSD 6.6 whois(1).
This improves recursion support and querying whois servers.

It helps to separate arguments from the query.
While still suboptimal (you cannot use all the queries specified for .DE),
at least this way we don't get cryptic error messages for standard queries.

fix non-literal string format

fix -Wcast-qual issues

Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

convert __attribute__s to applicable cdefs.h macros

PR/36957: sm: whois does not follow AfriNIC referral

Coverity CID 1736: close files before returning.

remove an unused variable

ok christos

add more crap for denic. From OpenBSD.

Deal with nic.de stupidity. Idea from OpenBSD, but simplified.

Homogenize usage messages: make the 'usage' word all lowercase, as this seems
to be the most common practice in our tree.

safer use of realloc

Sort options.

- enable WARNS 2
- delint (void casts, shadow warning on port)
- always cast to unsigned char for isfoo() macros, not sometimes.
- save errno to avoid reporting random error value.
- use warnx() when

- enable WARNS 2
- delint (void casts, shadow warning on port)
- always cast to unsigned char for isfoo() macros, not sometimes.
- save errno to avoid reporting random error value.
- use warnx() when the error is indeed unknown.
- use getprogname() instead of __progname.
- make all locals static.

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christos@netbsd.org suggested we replace whois
with one that is KNF, has ipv6, better error
handling, and recursion. I settled on OpenBSDs.
Christos found some nits and had me commit as
is. Christos

christos@netbsd.org suggested we replace whois
with one that is KNF, has ipv6, better error
handling, and recursion. I settled on OpenBSDs.
Christos found some nits and had me commit as
is. Christos will follow up with fixes shortly.

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Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

use bounded string op

Add NetBSD RCS Ids.

Remove some STDC ifdefs, and some code that's for non-NetBSD systems.
ANSIfy.

Negative exit code cleanup: Replace exit(-x) with exit(x).
As seen on tech-userlevel.

don't know when the TOPDOMAIN compile-time option might be useful, but
doing strcat on a string literal is not a very good idea

getopt(3) returns -1 not EOF.

Return to whois.internic.net.
whois.networksolutions.com is just wrong -- it only returns information
for Network Solutions domains.
whois.opensrs.net is a bit better -- it returns information for Op

Return to whois.internic.net.
whois.networksolutions.com is just wrong -- it only returns information
for Network Solutions domains.
whois.opensrs.net is a bit better -- it returns information for OpenSRS
domains, and otherwise recurses to the correct whois server for other
domains -- unfortunately it is not canonical, and cannot be construed as
"correct." Other recursing proxies include whois.geektools.com and pallas.
eruditorum.org, neither of which is "official" either.

For good or for ill, we go back to whois.internic.net, which is the canonical
source for this information.

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