BUG/MINOR: ssl: load correctly @system-ca when ca-base is define

The configuration parser still adds the 'ca-base' directory when loading
the @system-ca, preventing it to be loaded correctly.

This patch fixes the problem by not adding the ca-base when a file
starts by '@'.

Fix issue #2313.

Must be backported as far as 2.6.

(cherry picked from commit b12613f0acc9e542baa4cb9626ef7f6693b984a7)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed