The '/' should be escaped as well.
The '/' should be escaped as well.

According to the 'ESAPI reference implementation', the '/' char has to
be escaped in HTML as well.

alobbs/libhpack,alobbs/libhpack,http2d/core,http2d/core,alobbs/libhpack,http2d/core,alobbs/libhpack,http2d/core