dhcp: Update to 4.2.3-P2

dhcp: Update to 4.2.3-P2

1. Update to 4.2.3-P2
2. From 4.2.0 final release, -lcrypto check was removed and we compile static libraries
from bind that are linked to libcrypto. This is why i added a patch in order to add
-lcrypto to LIBS.
3. Add openssl in DEPENDS as we need libcrypto from this package
4. Drop installing /var/lib/dhcp/ as it is handled in pkg_postinst

(From OE-Core rev: 1cd882c47865a501d5401bad44e1c7f460ce2699)

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>