upstream: Fill in missing man page bits for U2F security key support:

Mention the new key types, the ~/.ssh/id_ecdsa_sk file, ssh's
SecurityKeyProvider keyword, the SSH_SK_PROVIDER environment variable,
and ssh-keygen's new -w and -x options.

Copy the ssh-sk-helper man page from ssh-pkcs11-helper with minimal
substitutions.

ok djm@

OpenBSD-Commit-ID: ef2e8f83d0c0ce11ad9b8c28945747e5ca337ac4
diff --git a/Makefile.in b/Makefile.in
index a569bb9..fddc825 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -124,8 +124,8 @@
 	sandbox-seccomp-filter.o sandbox-capsicum.o sandbox-pledge.o \
 	sandbox-solaris.o uidswap.o
 
-MANPAGES	= moduli.5.out scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out ssh-keysign.8.out ssh-pkcs11-helper.8.out sshd_config.5.out ssh_config.5.out
-MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-keysign.8 ssh-pkcs11-helper.8 sshd_config.5 ssh_config.5
+MANPAGES	= moduli.5.out scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out ssh-keysign.8.out ssh-pkcs11-helper.8.out ssh-sk-helper.8.out sshd_config.5.out ssh_config.5.out
+MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-keysign.8 ssh-pkcs11-helper.8 ssh-sk-helper.8 sshd_config.5 ssh_config.5
 MANTYPE		= @MANTYPE@
 
 CONFIGFILES=sshd_config.out ssh_config.out moduli.out
@@ -372,6 +372,7 @@
 	$(INSTALL) -m 644 sftp-server.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/sftp-server.8
 	$(INSTALL) -m 644 ssh-keysign.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-keysign.8
 	$(INSTALL) -m 644 ssh-pkcs11-helper.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-pkcs11-helper.8
+	$(INSTALL) -m 644 ssh-sk-helper.8.out $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-sk-helper.8
 
 install-sysconf:
 	$(MKDIR_P) $(DESTDIR)$(sysconfdir)
@@ -444,6 +445,7 @@
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/sftp-server.8
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-keysign.8
 	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-pkcs11-helper.8
+	-rm -f $(DESTDIR)$(mandir)/$(mansubdir)8/ssh-sk-helper.8
 
 regress-prep:
 	$(MKDIR_P) `pwd`/regress/unittests/test_helper