ldap

Also some internal refactoring to make the code flow more consistent and predictable.

Also some internal Go 1.12 build updates.

This release adds a couple goodies in the ldap connection:

• Exposing the ldap.Conn.IsClosing()
• Exposing the ldap.Conn.TLSConnectionState()

Initial version of gopkg.in/ldap.v3

If you experience issues with this release you can fall back to gopkg.in/ldap.v2

• Fix race conditions when closing connections (#101, @adunham-stripe; #134, @judwhite)
• Fix panic when parsing filter with unbalanced parenthesis (#120, @vetinari)
• Correctly return error parsing malformed DN (#119, @vetinari)

• Fix potential panic when adding control descriptions (#92, @vetinari)
• Fix parsing of distinguished names to correctly ignore unescaped leading/trailing spaces (#98, @liggitt)
• Added DN/RDN comparison methods (#99, @liggitt)

Fixes error parsing controls missing a criticality field (https://github.com/go-ldap/ldap/issues/85, @vetinari)

• Export AddRequest struct variables (@nohupped, #60)
• Export ModifyRequest struct variables (@liggitt, #67)
• Improve handling of connection read errors (@jlhawn, #66)
• Prevent deadlock if server sends unexpected responses (@jlhawn, #69)

Add ability to set a client-side timeout on requests (@flowhamster)

Fixes a panic when a nil packet was encountered during a failed StartTLS operation (@trestletech)

• Fixed an issue where SearchWithPaging would add a paging control to a SearchRequest that already contained a paging control (@stevekuznetsov)
• Fixed incorrect godoc link in readme (@pnelson)

Added support for extensible match filters (@liggitt)
Added Client interface, which Conn conforms to (@stevekuznetsov)
Fixed parsing of filters with multibyte values (@liggitt)