pptp: 1.9.0 -> 1.10.0

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/fg5s243j07wch18a51gi22ayyyq6l2wl-pptp-1.10.0/bin/pptp --version` and found version 1.10.0
- ran `/nix/store/fg5s243j07wch18a51gi22ayyyq6l2wl-pptp-1.10.0/bin/pptpsetup -h` got 0 exit code
- ran `/nix/store/fg5s243j07wch18a51gi22ayyyq6l2wl-pptp-1.10.0/bin/pptpsetup --help` got 0 exit code
- found 1.10.0 with grep in /nix/store/fg5s243j07wch18a51gi22ayyyq6l2wl-pptp-1.10.0
- found 1.10.0 in filename of file in /nix/store/fg5s243j07wch18a51gi22ayyyq6l2wl-pptp-1.10.0

cc ""