Fix gsdcurl to correctly URL-quote a password passed via GSDCURL_PASSWORD
Fix gsdcurl to correctly URL-quote a password passed via GSDCURL_PASSWORD

BUG=none
TEST=use this script with a (correct) password that includes punctuation such as one of these: $&+,/:;=?@

Review URL: http://codereview.chromium.org/3058046

crawford/scripts,vmware/coreos-scripts,mjg59/scripts,BugRoger/scripts,coreos/scripts,sigma/coreos-scripts,vmware/coreos-scripts,glevand/coreos--scripts,mischief/scripts,trnubo/scripts,mischief/scripts,gtank/scripts,andrejro/coreos--scripts,crawford/scripts,bcwaldon/coreos-scripts,trnubo/scripts,mjg59/scripts,trnubo/scripts,smilart/scripts,fivethreeo/scripts,zhang0137/scripts,gtank/scripts,endocode/scripts,bcwaldon/coreos-scripts,endocode/scripts,BugRoger/scripts,endocode/scripts,BugRoger/scripts,crawford/scripts,zhang0137/scripts,nicescale/scripts,bcwaldon/coreos-scripts,andrejro/coreos--scripts,fivethreeo/scripts,coreos/scripts,mischief/scripts,zhang0137/scripts,sigma/coreos-scripts,marineam/coreos-scripts,marineam/coreos-scripts,sigma/coreos-scripts,marineam/coreos-scripts,smilart/scripts,mjg59/scripts,nicescale/scripts,vmware/coreos-scripts,fivethreeo/scripts,smilart/scripts,nicescale/scripts,glevand/coreos--scripts,gtank/scripts,andrejro/coreos--scripts