Support for Caddy log format

[crishoj]

We recently migrated from Nginx to Caddy, and the only thing I found myself missing is the fantastic ngxtop utility.

Thus, I thought I'd do a quick attempt with Claude Code to add support for Caddy log formats.

ngxtop -l /var/log/caddy/access.log -f caddy top host

running for 26 seconds, 7750 records processed: 296.93 req/sec

top host
| host          |   count |
|---------------+---------|
| imusic.se     |    1923 |
| imusic.pt     |    1671 |
| imusic.pl     |    1146 |
| imusic.br.com |     393 |
| imusic.co     |     347 |
| imusic.de     |     336 |
| imusic.au     |     309 |
| imusic.nl     |     235 |
| imusic.no     |     231 |
| imusic.fr     |     178 |

ngxtop -l /var/log/caddy/access.log -f caddy top remote_addr -n 25

running for 102 seconds, 36898 records processed: 361.39 req/sec

top remote_addr
| remote_addr     |   count |
|-----------------+---------|
| 66.249.77.96    |      63 |
| 66.249.77.98    |      59 |
| 66.249.75.5     |      59 |
| 66.249.77.230   |      58 |
| 66.249.75.7     |      56 |
| 66.249.75.131   |      56 |
| 66.249.75.234   |      53 |
| 192.178.6.101   |      53 |
| 66.249.77.99    |      51 |
| 66.249.77.100   |      51 |
| 136.243.228.182 |      51 |
| 13.58.91.217    |      51 |
| 83.94.121.58    |      50 |
| 66.249.77.97    |      50 |
| 66.249.77.233   |      50 |
| 66.249.75.133   |      50 |
| 192.178.6.96    |      50 |
| 66.249.75.8     |      49 |
| 66.249.75.233   |      49 |
| 66.249.77.232   |      48 |
| 192.178.6.105   |      47 |
| 192.178.6.100   |      47 |
| 66.249.77.226   |      46 |
| 66.249.77.225   |      46 |
| 66.249.75.6     |      46 |