901c366b survive `cd` being a function that fails instead of doing its job; see #123
git-subtree-dir: gitstatus
git-subtree-split: 901c366b8ecb736e579784b132442ee51bcb0840
d3bc3e34 work around bugs in curl on cygwin; see #706
61a67c66 print error message from curl/wget before the summary
git-subtree-dir: gitstatus
git-subtree-split: d3bc3e346cc71ee1a29d0c4316449feb3dcb3116