rec: fix test_libcrypto's scan for dup libcrypto by using a proper pattern

Fixes #12450

diff --git a/pdns/recursordist/test_libcrypto b/pdns/recursordist/test_libcrypto
index 91af04f225f8944779659b6961f1bcc3eb3b2a59..71e99abd22a368fff530d6d3f430fd9dbe878c18 100755 (executable)
--- a/pdns/recursordist/test_libcrypto
+++ b/pdns/recursordist/test_libcrypto
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ $(ldd pdns_recursor | grep -c libcrypto) -gt 1 ]; then
+if [ $(ldd pdns_recursor | grep -Fc libcrypto.) -gt 1 ]; then
   echo "Error! pdns_recursor is linked against multiple OpenSSL versions!"
   echo "This happens when one dependency is linked to OpenSSL 1.0, while"
   echo "pdns_recursor is linked against OpenSSL 1.1. Please set --with-libcrypto"