Fix spelling

[dforsi]

This PR fixes spelling errors in Doxygen comments and in plain comments. There are no changes in user-visible strings.

Fixed with: codespell --skip data,po --ignore-words-list=te --summary --write-changes

SUMMARY:
alway         3
amatuer       1
appearantly   2
apropriate    3
apropriately  3
arguement     1
asociated     3
becasue       2
begining      1
calback       1
calender      1
ceate         2
chanel        3
conencted     1
configration  3
containg      5
crate         4
dependant     1
diretory      1
emiting       1
exisits       1
flaoting      4
funcion       2
funtion       1
higer         2
imediately    1
impemented    1
laoded        6
lattitude     1
layed         1
mising        1
neccessary    1
numer         3
occured       8
refered       1
referene      3
relased       1
satelite      1
similiarly    1
simlar        1
simpley       1
som           2
streched      1
stucture      2
substract     1
successfull   4
supprot       1
therfore      1
useable       2
visiblity     1
wile          1
wont          1

[csete]

Thanks