Update doc

[michaelortmann]

Found by: michaelortmann
Patch by: michaelortmann
Fixes:

One-line summary:

Additional description (if needed):

1. "Last recently changed" lines like the 1st line in ABOUT doc, is often forgotten and looking at our new shiny html version: https://docs.eggheads.org/about/about.html
   it looks like this line doesnt belong there, it should be removed and the page should start with the About headline.
   So this PR removes this cruft above this headline

2. the sizes of eggdrop install and source tarball have been updated to more likely current values. taken fresh on an x86_64 linux system with du -m.

3. the rendering of our doc to text files also doesnt work well with lines ending with "-", see:

   eggdrop/doc/ABOUT

   Line 43 in 277ec01

   v0.7 -v0.9 before finally going 1.0. This version of Eggdrop is part

   
   v0.7 -v0.9 should be v0.7 - v0.9

4. this is 1.10 tree, not 1.9:

   eggdrop/doc/ABOUT

   Line 44 in 277ec01

   of the 1.9 tree. A valiant effort has been made to chase down and

5. update sphinx_source/_themes/agogo/layout.html
   there was a typo: navigaton
   fixed it by updating 2 strings to the new ones in upstream sphinx 8.0.2:
   https://github.com/sphinx-doc/sphinx/blob/v8.0.2/sphinx/themes/agogo/layout.html

6. typo fixes.

7. A feature / usability update of the firststeps doc regarding fingerprint and nickserv magick

8. do not use public / in use ip addresses in doc, instead use the ones given by rfc 3849 and rfc 5737

Test cases demonstrating functionality (if applicable):

[michaelortmann]

What about removing all "Last revised" lines from docs?

What about updating the whole themes folder in eggdrop to the new sphinx version we use? Or did we customize the that theme?

[michaelortmann]

Found the following grammar glitch:

https://github.com/eggheads/eggdrop/blob/develop/doc/sphinx_source/about/legal.rst?plain=1#L6C165-L7C1

net.c is by Robey has placed it in the public domain.