* cipher/md4.c (md4_final): Avoid byte-by-byte buffer setting when
padding; Merge extra and last block processing.
* cipher/md5.c (md5_final): Ditto.
* cipher/rmd160.c (rmd160_final): Ditto.
* cipher/sha1.c (sha1_final): Ditto.
* cipher/sha256.c (sha256_final): Ditto.
* cipher/sm3.c (sm3_final): Ditto.
* cipher/tiger.c (tiger_final): Ditto.
* cipher/sha512.c (sha512_final): Avoid byte-by-byte buffer setting
when padding.
* cipher/stribog.c (stribog_final): Ditto.
* cipher/whirlpool.c (whirlpool_final): Ditto.