- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Due to a missing command-line argument, yacc regenerated the parser but
not its header file, resulting in a mismatch between the lexer and parser
and strange errors when reading the configuration file.

Approved by: re (blanket)

Regenerated lexer and parser

Approved by: re (blanket)

Forgotten in r255579: #include fixes.

Approved by: re (blanket)

Move prototypes into header.

Approved by: re (blanket)

Upgrade to 1.4.20.

Minimal subset of the unbound sources.

import unbound 1.4.17