Support multiple wifi network configs

[martinmurphy]

Support multiple wifi network configs as mentioned in #30
Allow details for up to three network to be entered in the wifi config form
Add a new menu option to the wifi functions menu to allow selection of one of the networks

[martinmurphy]

@oe1wkl I didn't include my other PR (#32) in this. I can include it if you like.

[oe1wkl]

Not sure how useful it would be to allow networks without password- most of these are captive portals that require to enter credentials through a web browser, which wouldn’t work with a Morserino.... Willi Von meinem Mobiltelefon gesendet

…

Am 03.10.2020 um 17:54 schrieb Martin Murphy ***@***.***>:  @oe1wkl I didn't include my other PR (#32) in this. I can include it if you like. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.

[martinmurphy]

When I wrote it, I was staying at a hotel that had wifi with no password, so I needed it.
However, I agree that they are not as common, so I'm not too concerned.
I think that being able to switch between some predefined networks easily, e.g. home, office, and phone hotspot is more useful.

Martin.