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default. Keeping the feature enabled is safe. Disabling it permits to disable the references to the SHA256 and SHA512 password encryption algorithms from the usage help and manuals (in addition to the support for these algorithms in the code). * libmisc/obscure.c, libmisc/salt.c, src/newusers.c, src/chpasswd.c, src/chgpasswd.c, src/passwd.c: ENCRYPT_METHOD is always supported in login.defs. Remove the ENCRYPTMETHOD_SELECT preprocessor condition. * libmisc/obscure.c, libmisc/salt.c, src/newusers.c, src/chpasswd.c, src/chgpasswd.c, src/passwd.c: Disable SHA256 and SHA512 if USE_SHA_CRYPT is not defined (this corresponds to a subset of the ENCRYPTMETHOD_SELECT sections).