Log Message:
libproxy: updated to 0.5.4

0.5.4

Add golang link to application page
Improve libproxy test coverage
Improve coverage
Specify library version more completely
Use the correct separator character for Windows ProxyOverride
Improve handling of Windows proxy settings:
Add curl option to the generated config for backend instead
Set initial state to online
Windows: Detect scheme presence in proxy URLs more robustly
Fix broken WPAD proxy resolution