wikitech - use ssl_ciphersuite to add HSTS

ssl_ciphersuite can also be used to add HSTS (I9bc1104b), 
so use it.

Change-Id: I4655ebb78b71eba5c8781c9960a25b212bd295b6
Merge "wikitech - use ssl_ciphersuite to add HSTS" into production