* Replaced the dummy implementations of the <grp.h> and <pwd.h>

functions by ones reading /etc/{group,passwd}.
* Added quasi-standard getpwent_r() and getgrent_r().
* Added _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX sysconf()
  constants.
* Moved initgroups() and getgrouplist() definition to grp.cpp. They use
  the same backend as the <grp.h> functions.
* Set the permissions of files created by the build system to what they
  should be on the image (executables: 755, others: 644). Otherwise only
  root could do anything under Haiku.
* Added build system variables HAIKU_ROOT_USER_NAME and
  HAIKU_ROOT_USER_REAL_NAME to customize name and real name of Haiku's
  root user.
* Added build system rules AddUserToHaikuImage and AddGroupToHaikuImage
  for adding additional users and groups (by default only root user and
  group and a "users" group are created).
* Adjusted BIND port and coreutils config.h files according to what
  features have become available.
* Fixed HAIKU_DOCUMENTATION_OBJECT_DIR definition. Untested, but it used
  a wrong variable name before.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24750 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/grp.h

@@ -29,6 +29,8 @@ extern int getgrnam_r(const char *name, struct group *group, char *buffer,
 				size_t bufferSize, struct group **_result);
 
 extern struct group *getgrent(void);
+extern int getgrent_r(struct group* group, char* buffer, size_t bufferSize,
+				struct group** _result);
 extern void setgrent(void);
 extern void endgrent(void);