update sftp client and server to new buffer API. pretty much just mechanical changes; with & ok markus
[atomicio.h auth-options.h auth.h auth2-gss.c authfd.h authfile.h] [bufaux.h buffer.h canohost.h channels.h cipher.h clientloop.h] [compat.h compress.h crc32.c crc32.h deattack.h dh.h dispatch.h] [dns.c dns.h getput.h groupaccess.h gss-genr.c gss-serv-krb5.c] [gss-serv.c hostfile.h includes.h kex.h key.h log.h mac.h match.h] [misc.h monitor.h monitor_fdpass.h monitor_mm.h monitor_wrap.h msg.h] [myproposal.h packet.h pathnames.h progressmeter.h readconf.h rsa.h] [scard.h servconf.h serverloop.h session.h sftp-common.h sftp.h] [ssh-gss.h ssh.h ssh1.h ssh2.h sshconnect.h sshlogin.h sshpty.h] [ttymodes.h uidswap.h uuencode.h xmalloc.h] standardise spacing in $OpenBSD$ tags; requested by deraadt@
[scp.c sftp.1 sftp.c sftp-client.c sftp-int.c progressmeter.c] [progressmeter.h] sftp progress meter support. original diffs by Nils Nordman <nino at nforced dot com> via markus@, merged to -current by me, djm@ ok.