(ITS#6247)

[daniel@pluta.biz]

Hi,

just some changes and cleanups according the still ongoing discussion on 
ldapext.

The patch can be downloaded here: 
ftp://ftp.openldap.org/incoming/daniel-pluta-100501.patch

Changes:
    - removed extensible matching rules strictly associated with 
dedicated syntaxes
    - added two universal matching rules instead:
        - nowMach (equality matching rule)
        - nowOrdering (ordering matching rule)
        - these two rules also support extensible match filters

To publish a correct server current time time-stamp value within Root-DSE:
    - apply the bugfix from ITS#6541
    - and use -DCTM_G_DIFFERENTIAL_SERVERTIME


To extend generalizedTime attribute types to also support "NOW" as 
assertion value:
     - use -DCTM_RFC4517_MR_AV_SYNTAX_VIOLATION


Beware of patching conflicts in schema_init.c:
This patch contains small redundant parts from my parallel contribution 
in ITS#6532

Regards,
Daniel