Update to curl-7.19.4, which fixes a redirection vulnerability.
The changes in the patch files are almost the same as in Eugene's PR,
although I arrived at them mostly independently :)
Reformat all patch files now that I use quilt to manage them.
Fix two complaints from portlint: needless use of CFLAGS and differentiation
between NOPORTDOCS and NOPORTEXAMPLES. Thanks, Eugene!
Submitted by: Eygene Ryabinkin <email@example.com>