configure should check for opacity of ECDSA_SIG and not use the openssl tests if it’s opaque #432

1. 
   gmaxwell commented at 7:38 am on December 6, 2016: contributor

   http://bitcoin.stackexchange.com/questions/49937/cannot-build-secp256k1-c-library-on-debian-stretch
2. 
   laanwj commented at 12:14 pm on December 8, 2016: member

   Same issue as #429
3. gmaxwell cross-referenced this on Dec 12, 2016 from issue Make the libcrypto detection fail the newer API. by gmaxwell
4. 
   gmaxwell commented at 10:26 am on February 17, 2017: contributor

   Resolved by #433
5. gmaxwell closed this on Feb 17, 2017

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