Fix 311 template hash names

[rhash]

Reworked PR #319 by @dajiaohuang.

Original descritption:
Names printed by --list-hashes, such as RIPEMD-160, are not recognized as template directives and are emitted literally. Match hash names case-insensitively after removing dashes from both the input and hash-table name. Initialize the normalization buffer so legacy-directive comparisons cannot inspect unset bytes, and cast input bytes to unsigned char before case conversion.

Closes #311.

Validation: compiled the actual shared-library CLI on Ubuntu with GCC 13.3 and SHA-NI disabled. The added executable-level regression verifies all 32 public hash names against their dashless aliases, SHA-256 of abc, and existing urlname/mtime directives. The original implementation fails at RIPEMD-160, returning the directive literally; the fix passes. All 26 groups of the full existing CLI suite pass, and git diff --check passes. Run the new standalone regression with python3 tests/test_template_hash_names.py ./rhash; it is not automatically wired into the existing shell suite. Other platforms and SHA-NI-enabled builds were not exercised for this PR.

[rhash]

Introduced print_hash_info.cmp_name field to simplify directive name comparision in printf_name_to_id().