o Disable over-optimaization for problem of ports/75291. [1]
o Clean-up some patches (to post-patch phase)
PR: ports/75291 [1]
Pointed out by: Lars Eggert <lars.eggert@netlab.nec.de> [1]
Informed by: Yoshihiro Yanagida <yosh@yanagi.to>
Inquiried by: many people
Sponsored by: Ensure Technology Ltd.