curl output is turned off by `-s` in the same place, we should unify the
behavior on wget, also, this help removes those wget outputs that can't
fit our coding style tests. cc #1739
Enable `--compressed` parameter on curl to automatically enable
compression on request content by sending coressponding header, if the
server side supports compression format like deflate or gzip, curl will
also decompress the content automatically, so there is no additional
works need to done manually on client side, but just enjoy the benifits
of bandwidth and time saving!
Take https://nodejs.org/dist/index.tab as an example which is last
modified on Tue, 14 Mar 2017 22:41:05 GMT, the compressed transmission
only take 4829 bytes howevet the not compressed on taks 48000 bytes,
which is about 10 times larger!
This feature can be traced back to Sep 3 2002, in curl commit:
- 64bbe9dfaf
So should be supported on various versions widely.
Jordan Harband