Prep for release (2.5.8)

CHANGES

 OpenLDAP 2.5 Change Log
 
-OpenLDAP 2.5.8 Engineering
+OpenLDAP 2.5.8 Release (2021/10/11)
 	Fixed libldap ldap_int_tls_connect: isdigit() requires unsigned char (ITS#9668)
 	Fixed libldap memory leak in ldap_get_option LDAP_OPT_X_TLS_PEERCERT (ITS#9696)
 	Fixed slapd to allow normalized values for namingContexts in cn=monitor (ITS#8341)

build/version.var

@@ -15,9 +15,9 @@
 ol_package=OpenLDAP
 ol_major=2
 ol_minor=5
-ol_patch=X
-ol_api_inc=20507
+ol_patch=8
+ol_api_inc=20508
 ol_api_current=1
-ol_api_revision=2
+ol_api_revision=3
 ol_api_age=1
-ol_release_date="2021/08/18"
+ol_release_date="2021/10/11"