Add EC vaporware: change relevant Makefiles and add some empty source
files.

"make update".

compared to it has the type size_t.  Included the needed headers to
make that happen.

sure they are available in opensslconf.h, by giving them names starting
with "OPENSSL_" to avoid conflicts with other packages and by making
sure e_os2.h will cover all platform-specific cases together with
opensslconf.h.

I've checked fairly well that nothing breaks with this (apart from
external software that will adapt if they have used something like
NO_KRB5), but I can't guarantee it completely, so a review of this
change would be a good thing.

only queried when the /dev/[u]random devices did not return enough
entropy. Only the amount of entropy missing to reach the required minimum
is queried, as EGD may be drained.
Queried locations are: /etc/entropy, /var/run/egd-pool

At the same time, add VMS support for Rijndael.

In crypto/err/err.c need to initialise p to
NULL in case thread_hash is NULL. Otherwise
p will be uninitialized.

"Jan Mikkelsen" <janm@transactionsite.com> correctly states that the
OpenSSL header files have #include's and extern "C"'s in an incorrect
order.  Thusly fixed.

Submitted by: Andrew Gray <agray@iconsinc.com>

instead of 'unsigned' counters.
Seed PRNG in MacOS/GetHTTPS.src/GetHTTPS.cpp.

Partially submitted by Yoram Meroz <yoram@mail.idrive.com>.

eliminate some of the -Wcast-qual warnings (debug-ben-strict target)

are not guaranteed to be unpredictable.

returns int (1 = ok, 0 = not seeded). New function RAND_add() is the
same as RAND_seed() but takes an estimate of the entropy as an additional
argument.