[openssl/openssl] 706fc5: c_rehash: Fix file extension matching

[uedvt359]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 706fc5f6ebd63e1fcd18d4764248206ab3c18a0a
      https://github.com/openssl/openssl/commit/706fc5f6ebd63e1fcd18d4764248206ab3c18a0a
  Author: Tobias Girstmair <tobias.girstmair at tirol.gv.at>
  Date:   2022-10-20 (Thu, 20 Oct 2022)

  Changed paths:
    M tools/c_rehash.in

  Log Message:
  -----------
  c_rehash: Fix file extension matching

For some reason, parenthesis were added 8 years ago in commit
a787c2590e468585a1a19738e0c7f481ec91b762. This essentially removed the
\. and $ constructs from the middle branches. Hence a file called e.g.
cert.key would accidentally match the (cer) rule.

CLA: trivial

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19427)