Add DTLS to SSL_get_version

(Imported from upstream's 504e643e0996fb842ac183023c3a6b9049af50ea)

Change-Id: I94f4fea105b6eeb001d376ca3ffef77d1432aa88
Reviewed-on: https://boringssl-review.googlesource.com/4462
Reviewed-by: Adam Langley <agl@google.com>
1 file changed