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allocates a new one.  This resolves a crash seen on WinXP, caused
by r1103595.

Bad revision found by: Gregg L Smith <gls gknw.net>


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It allows to log custom debug messages at various phases in the request
processing and is the first consumer of the new string-valued ap_expr API.


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- add possibility to have expressions that evaluate to a string and not to
  a boolean value
- modify ap_expr_parse_cmd() interface to support this and make it more
  convenient to use in general
- rename AP_EXPR_FLAGS_* to AP_EXPR_FLAG_* for consistency


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PR: 37912
Submitted by: Nick Burch <nick burch alfresco com>



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where open() fails for a new log file.

* support/rotatelogs.c (struct logfile): New structure.
  (struct rotate_status): Store only current logfile state here, using
  struct logfile.
  (close_logfile): Rename from closeFile; assume a valid logfile
  structure is passed in; simplify to use stored filename.
  (checkRotate, main): Adjust for new structure.
  (post_rotate): Adjust, move linkfile handling here.
  (doRotate): Simplify.


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new log file is opened as well as for rotations:

* support/rotatelogs.c (usage): Update.
  (post_rotate): Omit third arg if no prev logfile known.
  (doRotate): Invoke even if no previous logfile was open.



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optional functions for the inter-module API:

* modules/ldap/ldap_private.h: New file, containing "real" function
  declarations, copied from...

* include/ap_ldap.h.in, include/ap_ldap_url.h,
  include/ap_ldap_option.h, include/ap_ldap_init.h,
  include/ap_ldap_rebind.h: ... here.  All declarations changed to APR
  optional function declarations.

* modules/ldap/util_ldap.c (util_ldap_register_hooks): Register all
  the new optional functions.

* modules/aaa/mod_authnz_ldap.c (ImportULDAPOptFn): Pick up optional
  function stub for ap_ldap_url_parse.
  (mod_auth_ldap_parse_url): Use it here.


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PR: 48930.
Submitted by: Peter Schuller <scode spotify com>


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PR: 51398
Submitted by: Christophe Jaillet <christophe jaillet wanadoo fr>


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it where possible.


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