macos-setup.sh: ftp.pcre.org no longer exists
## Summary
tools/macos-setup.sh tries to obtain pcre from ftp.pcre.org, which no longer exists.
## Steps to reproduce
On a Mac, execute tools/macos-setup.sh.
## What is the current bug behavior?
The download of pcre times out.
## What is the expected correct behavior?
pcre is downloaded and installed
## Sample capture file
N/A
## Relevant logs and/or screenshots
```
pkoning:wireshark pkoning$ tools/macos-setup.sh
Using the 12.1 SDK
Downloading, building, and installing pcre:
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:01:22 --:--:-- 0
curl: (7) Failed to connect to ftp.pcre.org port 443: Operation timed out
```
## Build information
System used is a Macbook M1, Mac OS 11.6.2 (Big Sur).
issue