silence compiler warnings

[35942] Update random number generator to ChaCha based (and add tests) Squashed commit of the following: commit 219a904fea95c74016229b6f4436d4f09de1bfd0 Author: Evan Hunt <each@isc.org> Date: Mon Jun 2 12:20:54 2014 -0700 [rt35942] style commit 90bc77185e9798af4595989abb8698efef8c70d7 Author: Mukund Sivaraman <muks@isc.org> Date: Mon Jun 2 18:01:30 2014 +0530 Return p-value=0 when prerequisite (monobit) fails commit 5594669728f1181a447616f60b835e4a043d1b21 Author: Mukund Sivaraman <muks@isc.org> Date: Mon Jun 2 17:44:25 2014 +0530 Print proportion of test sequences passing too commit 9e94b67a4114651224a8285f7c4a7fb03907f376 Author: Mukund Sivaraman <muks@isc.org> Date: Mon Jun 2 17:34:03 2014 +0530 Check uniform distribution of p-values commit acf911b32dd84ac1c30c57d8937cfeb6b3ff972f Author: Mukund Sivaraman <muks@isc.org> Date: Mon Jun 2 17:17:39 2014 +0530 Check proportion of sequences passing a test commit 7289eb441fc4ec623364ad882e22b240ba8da308 Author: Mukund Sivaraman <muks@isc.org> Date: Mon Jun 2 04:33:37 2014 +0530 Refactor common setup code into random_test() No behavioral change is made. commit 51feef3e08c233d34a6b8b9d25a72d43110b4eed Author: Mukund Sivaraman <muks@isc.org> Date: Sun Jun 1 17:31:57 2014 +0530 Fix binary rank computation commit 0ea3c03dea353f309d13c38e26aa0abbffdcff2b Author: Mukund Sivaraman <muks@isc.org> Date: Tue May 27 06:01:10 2014 +0530 Add binary matrix rank RNG test commit eb4e7c53540ac97436d94714d30084907eeff01a Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 26 15:45:31 2014 +0530 Add function to find rank of a binary matrix commit 1292a06e0e09ebd37d4ecf5337814951dcacc4a4 Author: Evan Hunt <each@isc.org> Date: Thu May 29 16:21:51 2014 -0700 [rt35942] style; check whether we need libm for exp() commit c19788e5a89235e937a5aedf2ebea50f33406609 Author: Evan Hunt <each@isc.org> Date: Thu May 29 15:31:19 2014 -0700 [rt35942] incidental spelling error fixed commit c833326ad0df21e2a8b35958e85ccc0a692e38be Author: Mukund Sivaraman <muks@isc.org> Date: Thu May 29 11:34:37 2014 +0530 Revert "Add function to find rank of a binary matrix" This reverts commit 21b2f230e17f7fc638f81d9a34bcb148b0c4a6fb. This test will be added in RT#36125. commit cf786a533d34fdcd9e1c5650356e56d33e93a29f Author: Mukund Sivaraman <muks@isc.org> Date: Thu May 29 11:33:18 2014 +0530 Revert "Add binary matrix rank RNG test" This reverts commit dd843b9ca84fa9af80ec39631152f82778f0b97c. This test will be added in RT#36125. commit dd843b9ca84fa9af80ec39631152f82778f0b97c Author: Mukund Sivaraman <muks@isc.org> Date: Tue May 27 06:01:10 2014 +0530 Add binary matrix rank RNG test commit 21b2f230e17f7fc638f81d9a34bcb148b0c4a6fb Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 26 15:45:31 2014 +0530 Add function to find rank of a binary matrix commit 313c30088d6ba933bde3abb920f2a6d16b9b77e1 Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 26 13:38:44 2014 +0530 Add block frequency random test commit 0d279c60ed3eabe52cf3e1435bf14ec62752536f Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 26 13:04:03 2014 +0530 Add preconditions from NIST spec commit 7a6c5f2ce5078814d5cf0fea30596e58171174c1 Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 26 12:51:03 2014 +0530 Add functions to use in RNG tests commit 8c5cb5594f904f6669cdffaa364f799b4a2c6b58 Author: Mukund Sivaraman <muks@isc.org> Date: Thu May 22 00:26:10 2014 +0530 Add runs RNG test commit 4882f078cc2596c0911066ffb783e4dd145a63ec Author: Mukund Sivaraman <muks@isc.org> Date: Wed May 21 23:58:20 2014 +0530 Pre-compute bitcounts LUT commit 896db3809fba2d9884a4a3a2fa847a73e007ad7f Author: Mukund Sivaraman <muks@isc.org> Date: Wed May 21 23:30:23 2014 +0530 Fix the bit value being checked (this shouldn't affect the test) commit b932cbb5dae39eb819db29cf9490fb51d59b7c56 Author: Mukund Sivaraman <muks@isc.org> Date: Wed May 21 19:35:12 2014 +0530 Add monobits RNG test commit 7bef19fd8b095aa567a975ef5c97d5812162d92e Author: Mukund Sivaraman <muks@isc.org> Date: Wed May 21 16:53:02 2014 +0530 Add API documentation commit 54483f7feb64b5646dd1da45b1fd396e7d04b926 Author: Mukund Sivaraman <muks@isc.org> Date: Wed May 21 16:39:03 2014 +0530 Rename isc_rngctx_t to isc_rng_t commit 7c5031b53555137a82c6b6218cd4dd5e95acf94d Author: Evan Hunt <each@isc.org> Date: Tue May 20 23:29:53 2014 -0700 [rt35942] use attach/detach with isc_rngctx_t commit 8aabae5e09888e6af651ed27bd6b4e9f76334d55 Author: Mukund Sivaraman <muks@isc.org> Date: Tue May 20 18:32:42 2014 +0530 Move RNG from dispatch.c to libisc commit e6d4ad4f389998b91d46e95e258cf420cb21d977 Author: Mukund Sivaraman <muks@isc.org> Date: Mon May 12 19:16:27 2014 +0530 Replace old arc4random with new ChaCha implementation from OpenBSD