config: Optimize for speed not size

We don't care that much about binary sizes. What we care much more about is performance.

Example from openssl benchmark on Turris Omnia:

-blowfish cbc     31828.77k    34072.13k    34575.86k    34862.61k    34960.07k    34880.97k
+blowfish cbc     44087.01k    48574.86k    50495.69k    50045.71k    50657.71k    50395.53k

-aes-256 cbc      34569.29k    36977.21k    38553.42k    38331.73k    38312.02k    38460.17k
+aes-256 cbc      37079.18k    40329.57k    41345.76k    41927.39k    41947.61k    41910.39k