bc: rename config options

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/dc.tests

@@ -41,6 +41,9 @@ testing "dc complex without spaces (multiple args)" \
 	"16\n" \
 	"" ""
 
+optional FEATURE_DC_BIG
+# All tests below depend on FEATURE_DC_BIG
+
 testing "dc '>a' (conditional execute string) 1" \
 	"dc" \
 	"1\n9\n" \

testsuite/head.tests

@@ -31,10 +31,12 @@ testing "head -n <positive number>" \
 	"line 1\nline 2\n" \
 	"" ""
 
+optional FEATURE_FANCY_HEAD
 testing "head -n <negative number>" \
 	"head -n -9 head.input" \
 	"line 1\nline 2\nline 3\n" \
 	"" ""
+SKIP=
 
 rm head.input
 

testsuite/unzip.tests

@@ -31,10 +31,10 @@ rmdir foo
 rm foo.zip
 
 # File containing some damaged encrypted stream
-optional FEATURE_UNZIP_CDF
+optional FEATURE_UNZIP_CDF CONFIG_UNICODE_SUPPORT
 testing "unzip (bad archive)" "uudecode; unzip bad.zip 2>&1; echo \$?" \
 "Archive:  bad.zip
-  inflating: ]3j½r«IK-%Ix
+  inflating: ]3j½r«I??K-%Ix
 unzip: corrupted data
 unzip: inflate error
 1