Fix EATON download

[francois2metz]

fix #836 and #829

I had to use a custom user agent, as akamai seems to forbid curl.

[SuperQ]

Ugh, really? They're blocking curl UA?

[SuperQ]

This needs a DCO sign-off. You can use git commit -s --amend to add it.

[h-leth]

Any progress on this PR?

[francois2metz]

For some reasons the build fail on circleci. I tried to remove the manual user agent, but it fail later.

[h-leth]

Ok
I found the missing files in a Git repo and downloaded them from there. It works on my computer
If you want I can open a new PR or you can use my code and make a new commit

EATON_EPDU_URL    := https://raw.githubusercontent.com/librenms/librenms/master/mibs/eaton/EATON-EPDU-MIB
EATON_SENSOR_URL  := https://raw.githubusercontent.com/librenms/librenms/master/mibs/eaton/EATON-SENSOR-MIB

--snip--

$(MIBDIR)/EATON-EPDU-MIB.txt:
	@echo ">> Downloading EATON-EPDU-MIB.txt to $@"
	@curl $(CURL_OPTS) -o $@ $(EATON_EPDU_URL)

$(MIBDIR)/EATON-SENSOR-MIB.txt:
         @echo ">> Downloading EATON-SENSOR-MIB.txt to $@"
         @curl $(CURL_OPTS) -o $@ $(EATON_SENSOR_URL)

[SuperQ]

Fixed with #843