dhcp: collective update

This update fixes the following issues for dhcp:
- 732910: fixed close-on-exed patch to not set it on stderr
- 739696: fixed incorrect "a" array type option parsing causing to discard e.g. classless static routes from lease file and zero-length option parsing such as dhcp6
- fixed dhclient to include its pid number in syslog messages

Fixed bugs
bnc#732910
dhclient does not work with "ifup"
bnc#739696
dhcp-client lease parsing problems
Selected Binaries
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