an array for signatures when there are none since "calloc(0, n) returns
NULL on some platforms (eg Tru64), which is explicitly permitted by
POSIX. Diagnosis and patch by svallet genoscope.cns.fr.
openbsd-compat/bindresvport.c openbsd-compat/getrrsetbyname.c
openbsd-compat/port-tun.c openbsd-compat/rresvport.c] Include <arpa/inet.h>
for hton* and ntoh* macros. Required on (at least) HP-UX since we define
_XOPEN_SOURCE_EXTENDED. Found by santhi.amirta at gmail com.
[canohost.c channels.c cipher-acss.c defines.h dns.c gss-genr.c]
[gss-serv-krb5.c gss-serv.c log.h loginrec.c logintest.c readconf.c]
[servconf.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c ssh-rand-helper.c]
[ssh.c sshconnect.c sshd.c openbsd-compat/bindresvport.c]
[openbsd-compat/bsd-arc4random.c openbsd-compat/bsd-misc.c]
[openbsd-compat/getrrsetbyname.c openbsd-compat/glob.c]
[openbsd-compat/mktemp.c openbsd-compat/port-linux.c]
[openbsd-compat/port-tun.c openbsd-compat/readpassphrase.c]
[openbsd-compat/setproctitle.c openbsd-compat/xmmap.c]
make the portable tree compile again - sprinkle unistd.h and string.h
back in. Don't redefine __unused, as it turned out to be used in
headers on Linux, and replace its use in auth-pam.c with ARGSUSED
_res, prevents problems on some platforms that have _res as a global but
don't have getrrsetbyname(), eg IRIX 5.3. Found and tested by
georg.schwarz at freenet.de, ok djm@.