Re-design controls

[Altai-man]

• Docs claim that a single control can be passed, while it is NYI
• To decide means about API types and real ASN.1 types
• Implement Paged control (https://tools.ietf.org/pdf/rfc2696.pdf)

[Altai-man]

@abraxxa
Pagination control is implemented along with means to handle such things in a more generic ways.
A working example can be found at https://github.com/Altai-man/cro-ldap/blob/master/t/09-ext-controls.t

[abraxxa]

As noted on IRC our query against Active Directory still fails at random pages with error K00002040: SvcErr: DSID-031, problem 5 (UNAVAIL_EXTENSION) which can only be seen with CRO_TRACE.

[Altai-man]

Is it able to finish a single search?
For example, in https://github.com/Altai-man/cro-ldap/blob/master/t/09-ext-controls.t#L31 <- how many iterations are done? Is the number changes?

Also, are base dn for search and filter stay the same?

[abraxxa]

I tried fetching 500 entries which seems to be the default AD limit per page and also only 10 and it stops after one, two or sometimes up to six pages, different with each execution.