mod_authnz_ldap: Support the expression parser within the require
directives.

Submitted by: minfrin
Reviewed/backported by: jim


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    digest auth is only marginally more secure than basic auth.
    Adjust the docs to today's reality.

    mention insecure password storage as pointed out by Graham



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the change to acinclude.m4 (part of r1527294) was left out from the
backport proposal by mistake.

Originally proposed by: kbrand. Reviewed by: jim, jorton (cf. r1542297).


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emphasize that this is mostly just AAA checks and not the status
code of the handler. PR21828 and various dups.




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Check if malloc succeeded
PR54344 [Bill Parker, wp02855 gmail com]

Check all memory allocations and abort on failure


follow-up to r1542533:

fix format string (unsigned vs. size_t)

Submitted by: jailletc36, sf, trawick
Reviewed/backported by: jim


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trunk patch: http://svn.apache.org/viewvc?view=revision&revision=1534321
             http://svn.apache.org/viewvc?view=revision&revision=1550061

Submitted by: Jan Kaluza <jkaluza redhat.com>
Reviewed by: jim, jorton, minfrin


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  - log.c: avoid needless apr_pstrdup()
  - Use apr_pstrmemdup instead of apr_pstrndup when this is safe.
  - Use apr_pstrmemdup instead of apr_pstrndup when this is safe.
  - Remove redundant check
  - 'ap_getword_conf' does not return NULL but an empty string
  - Ease logic around 'ap_getword_conf' and drop useless line of code.
  - 'ap_getword_conf' can not return NULL
  - 'ap_getword_conf' can not return NULL
  - Remove redundant check (already performed the line before)
  - Use 'apr_pstrmemdup' instead of 'apr_pstrndup' when applicable
trunk patches:
  - https://svn.apache.org/viewvc?view=revision&revision=1532122
  - https://svn.apache.org/viewvc?view=revision&revision=1549676
  - https://svn.apache.org/viewvc?view=revision&revision=1549680
  - https://svn.apache.org/viewvc?view=revision&revision=1550651
  - https://svn.apache.org/viewvc?view=revision&revision=1551005
  - https://svn.apache.org/viewvc?view=revision&revision=1551009
  - https://svn.apache.org/viewvc?view=revision&revision=1551010
  - https://svn.apache.org/viewvc?view=revision&revision=1551011
  - https://svn.apache.org/viewvc?view=revision&revision=1551012
  - https://svn.apache.org/viewvc?view=revision&revision=1551013
2.4.x patches: trunk patches work
               http://people.apache.org/~jim/patches/ez-2.4-v2.patch
+1: jailletc36, jim, minfrin


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