Merge #9514: release: Windows signing script

09fe2d9 release: update docs to show basic codesigning procedure (Cory Fields)
f642753 release: create a bundle for the new signing script (Cory Fields)
0068361 release: add win detached sig creator and our cert chain (Cory Fields)

Tree-SHA512: 032ad84697c70faaf857b9187f548282722cffca95d658e36413dc048ff02d9183253373254ffcc1158afb71140753f35abfc9fc8781ea5329c04d13c98759c0

contrib/macdeploy/detached-sig-create.sh

@@ -10,7 +10,7 @@ BUNDLE="${ROOTDIR}/Bitcoin-Qt.app"
 CODESIGN=codesign
 TEMPDIR=sign.temp
 TEMPLIST=${TEMPDIR}/signatures.txt
-OUT=signature.tar.gz
+OUT=signature-osx.tar.gz
 OUTROOT=osx
 
 if [ ! -n "$1" ]; then