try to solve problems from server change: https, shorter URL, redirects

with the shorter URL some commands fail because they are not instructed to follow redirects, or do not accept these request status codes. Also tried renaming URLs

added test-needed label

added 4 commits

• b6593dbb - lcginstall: add -L to curl calls to follow redirects
• 41b3cd36 - lcginstall.checkurl, accept 301 and 302 moved permenently or temporarily
• 19964be5 - lcginstall: http -> https, shorten lcgpackages URLs
• 7f05693d - cvmfs_install: http -> https, shorten lcgpackages URL

Compare with previous version

mentioned in commit 59e35c20

merged

added sweep:ignore label