r.in.ascii + -i, -f, and -d flags

[pmav99]

According to the docs:

r.in.ascii may import integer, floating point, or double cell types using the -i, -f, and -d flags, respectively.

Using these flags raises an exception though. Not sure if it is a documentation issue or a bug.

[mmetz]

In 74389:

r.in.ascii: remove -i, -f, -d flags from manual, fixes #3813

[mmetz]

In 74390:

r.in.ascii: remove -i, -f, -d flags from manual, fixes #3813 (backport trunk r74389)