pointers to the internal default functions

changed the use of AC_CHECK_TYPE as the previous approach is deprecated
require 2.57 properly

out if necessary

2. don't leave allocated memory behind when returning error

only set cookiejar if selected

allocation calls will succeed, the following will return NULL!

of test cases that were "considered".

badness in the string and we help our user by returning an error.

to support numbers larger than 9

this runs on windows, to find out the current working directory.

made the generated pdf and html files get removed on 'make clean'. Made
the pdf conversion remove the temporary .ps files.

made the libcurl.3 one a more generic overview

NTLM patch. Test case 84 and 85 verify this.