src/network: make the use of .netrc optional
src/network: make the use of .netrc optional

libcurl ignores the ~/.netrc file by default.

This makes the use of the ~/.netrc file optional; the information in the
URL is preferred.

Signed-off-by: Gaël PORTAY <1666f60cfa201a60b0ea694168a0b6932673170a@collabora.com>

ejoerns/rauc,rauc/rauc,ejoerns/rauc,rauc/rauc,jluebbe/rauc,ejoerns/rauc,jluebbe/rauc,jluebbe/rauc,rauc/rauc