GitLab

- added boundary checks for Uint32Parser
- fixed #include order
- Class renamed to Dhcp4ConfigParser
- added extra test for Uint32Parser
- Many Doxygen fixes and clean-ups

For some reason comparison operator for std::vector<uint8_t> does
not work with EXPECT_EQ macro on OpenBSD.

Conflicts:
	ChangeLog
	src/lib/dhcp/cfgmgr.h
	src/lib/dhcp/tests/cfgmgr_unittest.cc

Conflicts:
	ChangeLog
	src/lib/dhcp/tests/Makefile.am

committing at my discretion.

Sunstudio is unhappy with plain NULL inside EXPECT_EQ and thinks it is
int. This makes it think otherwise.

This should fix compilation issue on sunstudio.

Planned for merge #2268

this works around a bit awkward installation setup where there's a link
from "python3" to "python3.x" but not from "python3-config" to the
corresponding "python3.x-config".  That happens for recent versions of
Homebrew.