Update verify.sh script to point to bitcoin.org

Now that downloads are no longer hosted on Sourceforge, update the
script to retrieve the binaries and signature file from bitcoin.org.

contrib/verifysfbinaries/README.md

@@ -1,5 +1,5 @@
 ### Verify SF Binaries ###
-This script attempts to download the signature file `SHA256SUMS.asc` from SourceForge.
+This script attempts to download the signature file `SHA256SUMS.asc` from https://bitcoin.org.
 
 It first checks if the signature passes, and then downloads the files specified in the file, and checks if the hashes of these files match those that are specified in the signature file.
 

contrib/verifysfbinaries/verify.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-###   This script attempts to download the signature file SHA256SUMS.asc from SourceForge
+###   This script attempts to download the signature file SHA256SUMS.asc from bitcoin.org
 ###   It first checks if the signature passes, and then downloads the files specified in
 ###   the file, and checks if the hashes of these files match those that are specified
 ###   in the signature file.
@@ -18,11 +18,11 @@ WORKINGDIR="/tmp/bitcoin"
 TMPFILE="hashes.tmp"
 
 #this URL is used if a version number is not specified as an argument to the script
-SIGNATUREFILE="http://downloads.sourceforge.net/project/bitcoin/Bitcoin/bitcoin-0.9.0rc1/SHA256SUMS.asc"
+SIGNATUREFILE="https://bitcoin.org/bin/0.9.2.1/SHA256SUMS.asc"
 
 SIGNATUREFILENAME="SHA256SUMS.asc"
 RCSUBDIR="test/"
-BASEDIR="http://downloads.sourceforge.net/project/bitcoin/Bitcoin/"
+BASEDIR="https://bitcoin.org/bin/"
 VERSIONPREFIX="bitcoin-"
 RCVERSIONSTRING="rc"
 
@@ -62,7 +62,7 @@ WGETOUT=$(wget -N "$BASEDIR$SIGNATUREFILENAME" 2>&1)
 #and then see if wget completed successfully
 if [ $? -ne 0 ]; then
    echo "Error: couldn't fetch signature file. Have you specified the version number in the following format?"
-   echo "[bitcoin-]<version>-[rc[0-9]] (example: bitcoin-0.7.1-rc1)"
+   echo "[bitcoin-]<version>-[rc[0-9]] (example: bitcoin-0.9.2-rc1)"
    echo "wget output:"
    echo "$WGETOUT"|sed 's/^/\t/g'
    exit 2