First of a series of cleanups to libfetch. Changed files, in
alphabetical order:

Makefile:
Add common.c to SRCS.

Make debugging easier by making 'CFLAGS += -DNDEBUG' conditional on DEBUG

Do

First of a series of cleanups to libfetch. Changed files, in
alphabetical order:

Makefile:
Add common.c to SRCS.

Make debugging easier by making 'CFLAGS += -DNDEBUG' conditional on DEBUG

Don't declare struct {ftp,http}err in {ftp,http}err.c; use struct fetcherr
instead.

README:
Remove the todo list, which is out of date anyway.

common.c: (new file)
Gather utility functions in this file.

Merge the error reporting functions intp _fetch_errstring(),
_fetch_seterr() and _fetch_syserr().

Set fetchLastErrCode and fetchLastErrText appropriately when fetchConnect
fails.

common.h: (new file)
Gather internal prototypes and structures in this files.

fetch.3:
Undocument fetchFreeURL().

Document a few more known bugs.

Document fetchLastErrCode and fetchLastErrText.

fetch.c:
Add descriptive comments to all functions that lacked them.

Move fetchConnect() to common.c.

Obviate the need for fetchFreeURL(), and remove it.

fetch.h:
Modify struct url_t so the document part is at the end.

ftp.c:
Remove code that is duplicated elsewhere.

http.c:
Remove code that is duplicated elsewhere.

Prompted by: jkh

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Commit a bunch of patches that have been accumulating:

- Fix the README to reflect the new status of the ftp code.
- Change tons of 'if (xxx < 0)' to 'if (xxx == -1)'
- Add two new interface func

Commit a bunch of patches that have been accumulating:

- Fix the README to reflect the new status of the ftp code.
- Change tons of 'if (xxx < 0)' to 'if (xxx == -1)'
- Add two new interface functions
- Fix the Makefile so it actually works (yay!)

Now the manpage is lagging even further behind... :( Next on the todo
list is to clean up the http code.

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Base64 code (and the MIT copyright) moved to http.c
FTP STORe and APPEnd added.
FTP proxy support added (untested).

FTP retrieve works.

Too many changes to list. Basically, FTP is nearly there and error
reporting is kinda sorted out. Now HTTP needs to catch up...

Imported libfetch into the tree. It compiles, but there's still some
work to do. I especially need help with the man page.