(ITS#8078) The configured TimeOut in the Back-meta overlay is not used during the connction phase

[elecharny@apache.org]

Full_Name: Emmanuel L.charny
Version: 2.4.40
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (90.46.56.240)


the back-meta overlay meta_back_init_one_conn() method set the timeout to get
the result to a value which is not the one configured (network-timeout AFAIU),
as shown in this portion of the code (line 469 in conn.c) :

        LDAP_BACK_TV_SET( &tv );  

retry:;
        rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );

which uses :

#define	LDAP_BACK_RESULT_TIMEOUT	(0)
#define	LDAP_BACK_RESULT_UTIMEOUT	(100000)
#define	LDAP_BACK_TV_SET(tv) \
	do { \
		(tv)->tv_sec = LDAP_BACK_RESULT_TIMEOUT; \
		(tv)->tv_usec = LDAP_BACK_RESULT_UTIMEOUT; \
	} while ( 0 )

The timeout is then set to 100ms, which might be too low when the remote server
is 'far'.