remove referrer by default
remove referrer by default

The referrer CSP is supported by chrome and firefox 38+.

Suppressing the referrer increases the users privacy and the image proxy isn't
any longer required to cloak the referrer on websites which are using hotlinking
protection based on referrers.

danielepolencic/miniflux,rgv151/miniflux,danielepolencic/miniflux,tourze/app-rss-reader,elais/miniflux,kordianbruck/miniflux,EpocDotFr/miniflux,rgv151/miniflux,denfil/miniflux,EpocDotFr/miniflux,cljnnn/miniflux,danielepolencic/miniflux,EpocDotFr/miniflux,kordianbruck/miniflux,mkresin/miniflux,kordianbruck/miniflux,tourze/app-rss-reader,cljnnn/miniflux,cljnnn/miniflux,denfil/miniflux,rgv151/miniflux,mkresin/miniflux,elais/miniflux,mrjovanovic/miniflux,mkresin/miniflux,jamesscottbrown/miniflux,jamesscottbrown/miniflux,pcwalden/miniflux,elais/miniflux,jamesscottbrown/miniflux,mrjovanovic/miniflux,mrjovanovic/miniflux,tourze/app-rss-reader,pcwalden/miniflux,pcwalden/miniflux,denfil/miniflux