BUG/MINOR: http: add-header: header name copied twice

The header name is copied two time in the buffer. The first copy is a printf-like
function writing the name and the http separators in the buffer, and the second
form is a memcopy. This seems to be inherited from some changes. This patch
removes the printf like, format.

This patch must be backported in 1.6 and 1.5 versions
(cherry picked from commit 53c1a9b7cb8f3fe79b5492218363b6c0ff608fc1)
(cherry picked from commit d281d68d3aa010f7e1a635c92ab486f7f2c666b9)
1 file changed