* RoadRunnr/crypto/no-rc4/PR-1169/OTP-13896:
  disable RC4 in SSL when crypto doesn't support it
  Fix compilation when OpenSSL doesn't support RC4

Conflicts:
	lib/crypto/c_src/crypto.c

When OpenSSL has been configured with the "no-rc4" option, the header
file rc4.h doesn't exist, and neither does the rc4 functions.
Let's handle those by checking whether OPENSSL_NO_RC4 is defined.

When OpenSSL has been configured with the "no-rc2" option, the header
file rc2.h doesn't exist, and neither does the function EVP_rc2_cbc.
Let's handle those by checking whether OPENSSL_NO_RC2 is defined.

Also update pbe_SUITE, which uses RC2-CBC in one of the tests.

Also correct algo_cipher[] size since it was one to small.

OpenSSL has deprecated the function RAND_pseudo_bytes used by
crypto:rand_bytes/1, so this function is now deprecated in OTP too.

rand_bytes/3 also used this function, but was not documented
so we can remove it right away.

This commit also removes the fallback in generate_key to use
rand_bytes/1 if strong_rand_bytes/1 throws low entropy.
This is a potential incompatibility but we think it is desirable
as crypto should provide cryptographically secure functions.

* henrik/update-copyrightyear:
  update copyright-year