build: move ndr_krb5pac check to the other Samba checks Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

build: Move libini_config 1.1.0 check to libini_config.m4 Move the check for libini_config >= 1.1.0 from samba.m4 to libini_config.m4 to have them all in one place, simplifying maintenance. Set boolean variables for every detected version and use one of them in samba.m4 instead. Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

build: Distinguish libini_config version checks Use separate shell variable name prefixes for checks of separate libini_config versions, as repeated invocations of PKG_CHECK_MODULES with the same prefix are not generally supposed to have an effect. Otherwise only the checks before and including the first one defining both *_CFLAGS and *_LIBS variables will be done and all that follow will assume success. This happens on RHEL6.5, where both "pkg-config --cflags" and "pkg-config --libs" for ini_config produce non-empty output and successful check for v0.6.1 results in incorrectly successful check for v1.1.0. Resolves: https://fedorahosted.org/sssd/ticket/2388 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

build: Mention required libini_config version Specify minimum required libini_config version in a message in samba.m4 explaining the need for the library. Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

AD-GPO: Add gpo-smb implementation in gpo_child process Reviewed-by: Sumit Bose <sbose@redhat.com>

AUTOCONF: Move detection of samba libraries to one file Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>