Adjustments on page nsxt-3-0-install.html

[Hyacinthe-Jacquet]

• Replaced "NSX Manager" with "NSX-T Manager".
• Removed the redundant part of the login URL.
• Corrected typos

Which other branches should this be merged with (if any)?
At least some are present since 1.8

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[Hyacinthe-Jacquet]

Sorry for the multiple commits. I was a bit confused because some issues I found while reading the doc are now already fixed in 1.11 doc, some in 1.10+, but it seems that a lot persist in 1.9. I understand that 1.9 is not maintained.

There are some other varying case used on "Logical Router"/"logical router" and on "Logical Switch"/"logical switch", which I'm not sure if it's intended or an issue.

There's also another issue with the MTU documentation. As far as I know, it is incorrect to state that overlay traffic requires an MTU at 9000. It is recommended to use "1600 or greater" (one page among others: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/administration/GUID-F7C976EF-2C0D-42D6-ACB5-13453BACD281.html). So the doc should say "1600", not "9000", unless there's an additional requirement for TKGI which should be explained.
Similarly, the statement that "NSX-T Edge Nodes must be connected to a port group that supports > 1600 bytes" is inaccurate, since the MTU should be greater or equals to 1600, not strictly greated to 1600. So > should be replaced by ≥.

[Hyacinthe-Jacquet]

@ograves-pivotal
I'm not sure if anything should be done about this varying case (maybe it's intended):

There are some other varying case used on "Logical Router"/"logical router" and on "Logical Switch"/"logical switch", which I'm not sure if it's intended or an issue.

But I do think something should be done about the MTU. Do I need to open a separate issue for this?

There's also another issue with the MTU documentation. As far as I know, it is incorrect to state that overlay traffic requires an MTU at 9000. It is recommended to use "1600 or greater" (one page among others: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/administration/GUID-F7C976EF-2C0D-42D6-ACB5-13453BACD281.html). So the doc should say "1600", not "9000", unless there's an additional requirement for TKGI which should be explained.
Similarly, the statement that "NSX-T Edge Nodes must be connected to a port group that supports > 1600 bytes" is inaccurate, since the MTU should be greater or equals to 1600, not strictly greated to 1600. So > should be replaced by ≥.

[Hyacinthe-Jacquet]

Logged the MTU point in a separate issue -> #1352