Add release notes for 1.0.0-rc3.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

doc/release-notes/release-notes-1.0.0-rc3.md

@@ -0,0 +1,51 @@
+Chirag Davé (1):
+      fReopenDebugLog and fRequestShutdown should be type sig_atomic_t
+
+Daira Hopwood (9):
+      Refactor README docs to avoid duplication.
+      Fix licensing to comply with OpenSSL and Berkeley DB licenses.
+      Changes to upgrade bdb to 6.2.23
+      util: Update tinyformat
+      Tweak descriptions of mining parameters for example zcash.conf.
+      Update dnsseeds for mainnet. closes #1369
+      Minor update to release process.
+      Remove the override of nMaxTipAge that effectively disables it on testnet.
+      Update version numbers for rc3.
+
+Jack Grigg (2):
+      Disable metrics screen in performance-measurements.sh
+      Link to #826 in doc/security-warnings.md, link to new Security website page
+
+Joe Turgeon (2):
+      Fixing floating point exception caused by metrics. Using default column width unless in a TTY.
+      Adding handling for ioctl failure. Updates from code review in PR #1615.
+
+Kevin Gallagher (2):
+      Prefer sha256sum but fall back to shasum if not available
+      Adds libgomp1 to Debian package depends
+
+Louis Nyffenegger (1):
+      Fix typo in README.md
+
+Paige Peterson (3):
+      add zcash.config
+      fix per Jack's mod suggestions
+      fix per Daira's suggestions
+
+Pieter Wuille (3):
+      Include signal.h for sig_atomic_t in WIN32
+      Revert "Include signal.h for sig_atomic_t in WIN32"
+      Use std::atomic for fRequestShutdown and fReopenDebugLog
+
+Sean Bowe (1):
+      Add manpages for zcashd and zcash-cli binaries for debian.
+
+Simon (4):
+      Fix incorrect error message in z_sendmany
+      Add z_sendmany rule that when sending coinbase utxos to a zaddr they must be consumed entirely, without any change, since there is currently no way to specify a change address in z_sendmany.
+      Add assert to AsyncRPCOperation_sendmany
+      Bump version number in sendalert.cpp
+
+bitcartel (1):
+      Update payment-api.md
+