Update configure options and add some missing steps.

The section about our local changes needs reviewing, and some of those
changes should probably be reconsidered (such as preferring DSA over RSA,
which made sense when RSA was encumbered but probably doesn't any more)

crypto/openssh/FREEBSD-upgrade

@@ -42,20 +42,28 @@
 7) Run configure with the appropriate arguments:
 
 	$ ./configure --prefix=/usr --sysconfdir=/etc/ssh \
-		--with-pam --with-tcp-wrappers --with-libedit
+		--with-pam --with-tcp-wrappers --with-libedit \
+		--with-ssl-engine
+
+   This will regenerate config.h, which must be committed along with
+   the rest.
 
    Note that we don't want to configure OpenSSH for Kerberos using
    configure since we have to be able to turn it on or off depending
    on the value of MK_KERBEROS.  Our Makefiles take care of this.
 
-8) Commit the resulting config.h.  Make sure you don't accidentally
-   commit any other files created by autoconf, autoheader or
-   configure; they'll just clutter up the repo and cause trouble at
-   the next upgrade.
+8) If source files have been added or removed, update the appropriate
+   makefiles to reflect changes in the vendor's Makefile.in.
 
-9) Build and test.
+9) Build libssh.  Follow the instructions in ssh_namespace.h to get a
+   list of new symbols.  Update ssh_namespace.h, build everything,
+   install and test.
 
-A) Re-commit everything on freefall (you *did* use a test repo for
+A) Build and test the pam_ssh PAM module.  It gropes around libssh's
+   internals and will break if something significant changes or if
+   ssh_namespace.h is out of whack.
+
+B) Re-commit everything on repoman (you *did* use a test repo for
    this, didn't you?)