Description of problem:
Curl does not honour -capath any more.


Version-Release number of selected component (if applicable):
curl-7.19.7-16.el6.x86_64


How reproducible:
100%


Steps to Reproduce:
#! /bin/sh
set -e

cadir=$(mktemp -d)
cd $cadir
# Fetch the root certificate SPI, Inc. Certificate Authority
# This is a CA which is not recognised by RHEL by default
wget http://www.spi-inc.org/ca/spi-cacert.crt
# Make sure OpenSSL can find it
ln -s spi-cacert.crt 56e29e75.0
ln -s spi-cacert.crt 56e29e75.1
# Now access a site whose certificate is signed by the SPI CA.
strace -f -s128 -o trace.txt -- \
	curl --verbose --capath $cadir https://trac.oftc.net
# Any attempt to use the capath?
grep $cadir trace.txt


Actual results:
--2011-01-14 14:27:35--  http://www.spi-inc.org/ca/spi-cacert.crt
Resolving www.spi-inc.org... 89.16.189.61
Connecting to www.spi-inc.org|89.16.189.61|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2854 (2.8K) [application/x-x509-ca-cert]
Saving to: “spi-cacert.crt”

     0K ..                                                    100% 74.8M=0s

2011-01-14 14:27:35 (74.8 MB/s) - “spi-cacert.crt” saved [2854/2854]

* About to connect() to trac.oftc.net port 443 (#0)
*   Trying 72.32.146.138... connected
* Connected to trac.oftc.net (72.32.146.138) port 443 (#0)
* Initializing NSS with certpath: /etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: /tmp/tmp.DhB1IwnNhv
* Certificate is signed by an untrusted issuer: 'E=support,CN=servers.ca.oftc.net,OU=certification authority for servers,O=Open and Free Technology Community'
* NSS error -8172
* Closing connection #0
* Peer certificate cannot be authenticated with known CA certificates

curl: (60) Peer certificate cannot be authenticated with known CA certificates
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.


Expected results:
-capath being honoured, like it is on RHEL5:

--2011-01-14 14:29:12--  http://www.spi-inc.org/ca/spi-cacert.crt
Resolving www.spi-inc.org... 89.16.189.61
Connecting to www.spi-inc.org|89.16.189.61|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2854 (2.8K) [application/x-x509-ca-cert]
Saving to: `spi-cacert.crt'

     0K ..                                                    100% 36.8M=0s

2011-01-14 14:29:12 (36.8 MB/s) - `spi-cacert.crt' saved [2854/2854]

* About to connect() to trac.oftc.net port 443
*   Trying 72.32.146.138... connected
* Connected to trac.oftc.net (72.32.146.138) port 443
* successfully set certificate verify locations:
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: /tmp/tmp.JzhCaj4366
* SSLv2, Client hello (1):
SSLv3, TLS handshake, Server hello (2):
SSLv3, TLS handshake, CERT (11):
SSLv3, TLS handshake, Server key exchange (12):
SSLv3, TLS handshake, Server finished (14):
SSLv3, TLS handshake, Client key exchange (16):
SSLv3, TLS change cipher, Client hello (1):
SSLv3, TLS handshake, Finished (20):
SSLv3, TLS change cipher, Client hello (1):
SSLv3, TLS handshake, Finished (20):
SSL connection using DHE-RSA-AES256-SHA
* Server certificate:
* 	 subject: /O=Open and Free Technology Community/CN=trac.oftc.net/emailAddress=support
* 	 start date: 2010-05-04 14:58:35 GMT
* 	 expire date: 2011-05-04 14:58:35 GMT
* 	 common name: trac.oftc.net (matched)
* 	 issuer: /O=Open and Free Technology Community/OU=certification authority for servers/CN=servers.ca.oftc.net/emailAddress=support
* SSL certificate verify ok.
> GET / HTTP/1.1
> User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
> Host: trac.oftc.net
> Accept: */*
> 
< HTTP/1.1 302 Found
< Date: Fri, 14 Jan 2011 13:29:14 GMT
< Server: Apache
< Location: http://www.oftc.net/oftc/CodingProjects
< Content-Length: 287
< Content-Type: text/html; charset=iso-8859-1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0   287    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
100   287  100   287    0     0    174      0  0:00:01  0:00:01 --:--:-- 41000* Connection #0 to host trac.oftc.net left intact

* Closing connection #0
* SSLv3, TLS alert, Client hello (1):
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>302 Found</title>
</head><body>
<h1>Found</h1>
<p>The document has moved <a href="http://www.oftc.net/oftc/CodingProjects">here</a>.</p>
<hr>
<address>Apache Server at trac.oftc.net Port 443</address>
</body></html>
4371  execve("/usr/bin/curl", ["curl", "--verbose", "--capath", "/tmp/tmp.JzhCaj4366", "https://trac.oftc.net"], [/* 22 vars */]) = 0
4371  write(2, "  CAfile: /etc/pki/tls/certs/ca-bundle.crt\n  CApath: /tmp/tmp.JzhCaj4366\n", 73) = 73
4371  stat("/tmp/tmp.JzhCaj4366/56e29e75.0", {st_mode=S_IFREG|0664, st_size=2854, ...}) = 0
4371  open("/tmp/tmp.JzhCaj4366/56e29e75.0", O_RDONLY) = 4
4371  stat("/tmp/tmp.JzhCaj4366/56e29e75.1", {st_mode=S_IFREG|0664, st_size=2854, ...}) = 0
4371  open("/tmp/tmp.JzhCaj4366/56e29e75.1", O_RDONLY) = 4


Additional info:
Reproducible with curl-7.21.3-2.fc15.x86_64 in Fedora Rawhide as well.