Docs: metrics: network: Clarify pre-process and running

[grahamwhaley]

Correct the typo in the network metrics build command, and clarify
how the tests can be run by hand after pre-processing.

Fixes: #944

Signed-off-by: Graham Whaley [email protected]

[jodh-intel]

lgtm

[chavafg]

qa-passed

[grahamwhaley]

Hi @jodh-intel @gorozco1 Looks like Travis is failing as the curl of the autoconf archive is giving a 502 Bad Gateway error. Not sure if that is a temporary or permanent issue - any thoughts?
If you try the url:
http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_valgrind_check.m4
then what I see in the logs is a 193 byte download instead of a 8852 byte download - that was the clue ;-)

[jodh-intel]

Hi @grahamwhaley - it does indeed look like that site is borked atm (you can't even download via cvs).

I think we might want to rethink our approach for obtaining autoconf-archive (#876 (review)). It's "overkill" to download the whole archive when we only want 2 files, but if we're pulling a stable release, not only do we know which version of the code we're actually using, but we have more choices wrt a reliable download site due to large number of available mirrors.

[jodh-intel]

... alternatively, we could just enable https://docs.travis-ci.com/user/caching/ so that once we have a good copy, we'll continue to use that.

[GabyCT]

lgtm

[iphutch]

Looks good from a docs team perspective.