Replace "fetch" with "fetch -r" when downloading the initial ~38MB
snapshot in order to avoid unnecessary re-downloading.
Remove the earlier "rm -f ${SNAPSHOTHASH}.tgz" to make this work.
1. make_index no longer coredumps if input has zero lines.
2. phttpget no longer enters an infinite loop if the TCP connection is
closed while phttpget is reading HTTP headers.
1. phttpget (and thus portsnap) now understands the HTTP_PROXY_AUTH
environment variable and basic HTTP proxy authentication.
2. portsnap.8 now contains a privacy notice.
3. portsnap can now ignore parts of the tree (similar to cvsup
"refuse" directives).
4. portsnap reacts sensibly if host(1) does not exist.
Log:
Handle circular dependencies properly (via errx(3)) rather than dumping
core. This bug was made visible by a recent change to the audio/timidity++
port, which now has itself as a run dependency.
Approved by: re (scottl)
