Fixes #5608: corretly update packages with rpmPackageInstallation on redhat
Fixes #5429: remove use of curl proxy on Windows
Merge pull request #527 from ncharles/bug_5608/dev/correctly_update_package

Fixes #5608: corretly update packages with rpmPackageInstallation on red...
Merge pull request #466 from ncharles/bug_5429/dev/no_proxy_on_windows

Fixes #5429: remove use of curl proxy on Windows
Merging 2.6 into 2.10
Merging 2.10 into 2.11