Settle on a method to find internal libraries

[Kris Deugau]

With recent-ish Perl releases, "." was justifiably removed from @INC.

This used to mostly work to keep scripts with library modules working when plonked down on some arbitrary path, but wasn't entirely reliable.

Strictly hardcoding a path works fine for any one given installation, but doesn't work well for code expected to be portable or easily moved elsewhere within a single system.

Some searching led to FindBin, applied in r797. However, after encountering a tainting issue with that fix, further searching led to ​https://www.perlmonks.org/?node_id=585299 and ​https://www.perlmonks.org/?node_id=41213, pretty clearly indicating that while FindBin basically worked, it a) did a lot of unnecessary work and b) largely succeeded by accident.

The second link led to the "scriptname" module, however on closer inspection it checks the script name for a handful of file extensions - which doesn't include several used by DNSAdmin. Also, this code is expected to run on some Truly Ancient(TM) systems on which it would be a pain to get said module properly installed.

[Kris Deugau]

In 834:

/trunk

Accumulated tinkering on compact-recs.pl, part 1

• Switch module-finding blob to latest theoretically-good form. See #80.
• Fix broken handling of "n'th natural IP" on compaction, possibly also on export
• Trim some development comments

[Kris Deugau]

In 837:

/trunk

Commit some lurking tweaks to mergerecs

• user info for log
• use location of ':ANY:' to find and match domains or reverse zones that may have default locations set

Update include path finder - see #80

[Kris Deugau]

In 839:

/trunk

Update dns.cgi include path finder - see #80
Allow more characters through from the web layer to the back end for the

record search and record list filter, building on r838

[Kris Deugau]

In 841:

/trunk

Update textrecs.cgi include path finder - see #80

[Kris Deugau]

In 843:

/trunk

Minor accumulated refinements on tiny-import.pl

• Update include path finder - see #80
• Clean up extra trailing :'s that sometimes confused the location
• Better handle "empty" TTL values
• Slightly improve SOA serial type tagging; only handles the most common case of "let tinydns handle it" UNIX-epoch serials for now

[Kris Deugau]

Need to investigate FindBin vs taint mode failures, although it might not be worth spending time on since the more complex construct such as in r841 seems to function without issue.

[Kris Deugau]

In 1055:

/trunk

Update include path finder in dns-rpc.cgi - see #80