Fix build with curl >= 7.62.  Patch taken from upstream:

https://pagure.io/SSSD/sssd/c/4d3841ca379afc01184453ba45ab3e75ffec60da?branch=sssd-1-16

diff --git a/src/util/tev_curl.c b/src/util/tev_curl.c
index 6a7a580..d70a429 100644
--- a/src/util/tev_curl.c
+++ b/src/util/tev_curl.c
@@ -97,7 +97,9 @@ static errno_t curl_code2errno(CURLcode crv)
         return ETIMEDOUT;
     case CURLE_SSL_ISSUER_ERROR:
     case CURLE_SSL_CACERT_BADFILE:
+#if LIBCURL_VERSION_NUM < 0x073e00
     case CURLE_SSL_CACERT:
+#endif
     case CURLE_SSL_CERTPROBLEM:
         return ERR_INVALID_CERT;
 
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<tr><td><span title='2017-11-08 22:36:20 +0100'>2017-11-08</span></td><td><a href='/guix/commit/gnu.scm?id=c5a4a92f1a796e342b7db4c458f1fdb61ffc8d40'>gnu: Improve error reporting of the use-.*modules macros.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-16 14:41:01 +0200'>2017-05-16</span></td><td><a href='/guix/commit/gnu.scm?id=b09a8da4a2e50845a297e041762f3ff9e649c047'>bootloader: Add extlinux support.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2016-04-18 01:24:06 +0200'>2016-04-18</span></td><td><a href='/guix/commit/gnu.scm?id=060d62a740fc1932a3be505534feff099b59ac9f'>system: Add (gnu system mapped-devices).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>