treewide: use --globoff with curl(1)

treewide: use --globoff with curl(1)

curl 7.29.0 (on CentOS 7.x) seems to mishandle square-bracketed
IPv6 addresses, at least.  Furthermore, we don't actually need
nor use the globbing in curl for lei when forwarding requests
from the lei command-line.  lei has its own globbing and
`--globoff' behavior for externals and none of it is intended
for curl.