SPECS: memcached: Align optional build dependencies

[Jingwiw]

Changes

• Add the missing remote asset checksum and use %autochangelog directly.

• Add the seccomp build dependency under the existing %bcond seccomp.

  The spec defaults seccomp on and passes --enable-seccomp, while upstream checks for seccomp_rule_add from libseccomp. The BuildRequires should describe that default build fact directly.

  Source: configure.ac

  AC_ARG_ENABLE(seccomp,
    [AS_HELP_STRING([--enable-seccomp],[Enable seccomp restrictions EXPERIMENTAL])])
  
  AS_IF([test "x$enable_seccomp" = "xyes" ], [
     AC_CHECK_LIB(seccomp, seccomp_rule_add, [

• Use the upstream SASL password database option name and align the SASL dependency guard.

  --enable-sasl-pwdb is the configure option upstream exposes. Enabling it also enables SASL, so the SASL BuildRequires must cover either %{with sasl} or %{with sasl_pwdb}.

  Source: configure.ac

  AC_ARG_ENABLE(sasl,
    [AS_HELP_STRING([--enable-sasl],[Enable SASL authentication])])
  
  AC_ARG_ENABLE(sasl_pwdb,
    [AS_HELP_STRING([--enable-sasl-pwdb],[Enable plaintext password db])])
  
  AS_IF([test "x$enable_sasl_pwdb" = "xyes"],
        [enable_sasl=yes ])

• Use pkgconfig(libsasl2) for the SASL build dependency.

  Upstream checks the SASL header and library symbols directly; in openRuyi, the cyrus-sasl devel package exposes libsasl2.pc, so the pkgconfig dependency names the same development interface more precisely.

  Source: configure.ac

  AC_CHECK_HEADERS([sasl/sasl.h])
  if test "x$enable_sasl" = "xyes"; then
    AC_SEARCH_LIBS([sasl_server_init], [sasl2 sasl], [],

  Source: SPECS/cyrus-sasl/cyrus-sasl.spec

  %files devel
  %{_libdir}/pkgconfig/libsasl2.pc

AIGC Declaration: CodeX with gpt5.5 was used as coding agent.

Signed-off-by: Jingwiw wangjingwei@iscas.ac.cn