move expand_strdup() to config.c

it's not really a generic function.

src/common.h

@@ -184,8 +184,6 @@ int ATTR_PRINTFLIKE(3, 4) nfsnprintf( char *buf, int blen, const char *fmt, ...
 void ATTR_NORETURN oob( void );
 void ATTR_NORETURN oom( void );
 
-char *expand_strdup( const char *s );
-
 int map_name( const char *arg, char **result, uint reserve, const char *in, const char *out );
 
 #define DEFINE_ARRAY_TYPE(T) \

src/config.c

@@ -20,6 +20,40 @@ char FieldDelimiter = ':';
 
 static store_conf_t *stores;
 
+char *
+expand_strdup( const char *s )
+{
+	struct passwd *pw;
+	const char *p, *q;
+	char *r;
+
+	if (*s == '~') {
+		s++;
+		if (!*s) {
+			p = NULL;
+			q = Home;
+		} else if (*s == '/') {
+			p = s;
+			q = Home;
+		} else {
+			if ((p = strchr( s, '/' ))) {
+				r = nfstrndup( s, (size_t)(p - s) );
+				pw = getpwnam( r );
+				free( r );
+			} else {
+				pw = getpwnam( s );
+			}
+			if (!pw)
+				return NULL;
+			q = pw->pw_dir;
+		}
+		nfasprintf( &r, "%s%s", q, p ? p : "" );
+		return r;
+	} else {
+		return nfstrdup( s );
+	}
+}
+
 char *
 get_arg( conffile_t *cfile, int required, int *comment )
 {

src/config.h

@@ -26,6 +26,8 @@ extern char FieldDelimiter;
 #define ARG_OPTIONAL 0
 #define ARG_REQUIRED 1
 
+char *expand_strdup( const char *s );
+
 char *get_arg( conffile_t *cfile, int required, int *comment );
 
 char parse_bool( conffile_t *cfile );

src/util.c

@@ -480,40 +480,6 @@ cur_user( void )
 }
 */
 
-char *
-expand_strdup( const char *s )
-{
-	struct passwd *pw;
-	const char *p, *q;
-	char *r;
-
-	if (*s == '~') {
-		s++;
-		if (!*s) {
-			p = NULL;
-			q = Home;
-		} else if (*s == '/') {
-			p = s;
-			q = Home;
-		} else {
-			if ((p = strchr( s, '/' ))) {
-				r = nfstrndup( s, (size_t)(p - s) );
-				pw = getpwnam( r );
-				free( r );
-			} else {
-				pw = getpwnam( s );
-			}
-			if (!pw)
-				return NULL;
-			q = pw->pw_dir;
-		}
-		nfasprintf( &r, "%s%s", q, p ? p : "" );
-		return r;
-	} else {
-		return nfstrdup( s );
-	}
-}
-
 /* Return value: 0 = ok, -1 = out found in arg, -2 = in found in arg but no out specified */
 int
 map_name( const char *arg, char **result, uint reserve, const char *in, const char *out )