Modify DNN cidr range and update go.mod

Update test.c (#54)

Grammar correction.

Fix: UPF send multiple buffered packet by 1 GTP packet when paging (#37)

When buffered data is stored, information of length for each packet is held.
When sending data, the stored contents are taken out by length, added with a header, and transmitted.

Release v1.0.0: Merge branch master into main