Allowing config file lines with arbitrary length

--- src/config.c
+++ src/config.c
@@ -100,7 +100,11 @@ static unsigned int get_number(char **from, char *par, char *filename, int linen
 int readconfig(config_t *config, char *filename, char *section)
 {
 	int	lineno, insection, havesection, sectioncount;
-	char	*p, word[80], line[300], sectname[80];
+	char	*p, word[80], sectname[80];
+	const size_t	buf_size = 256;
+	char	*line = (char *) malloc(buf_size);
+	size_t	line_len = buf_size;
+	size_t	len = 0;
 	FILE	*fp;
 
 	if ((fp = fopen(filename, "r")) == NULL) {
@@ -120,7 +124,17 @@ int readconfig(config_t *config, char *filename, char *section)
 		}
 
 	lineno = 0;
-	while (fgets(line, sizeof(line), fp) != NULL) {
+	while (fgets(line, line_len, fp) != NULL) {
+
+		len = strlen(line) - 1;
+		while (!feof(fp) && line[len] != '\n') {
+			line_len += buf_size;
+			line = realloc(line, line_len);
+			if (fgets(line + len + 1, buf_size + 1, fp) == NULL)
+				break;
+			len = strlen(line) - 1;
+			}
+
 		lineno++;
 		if ((p = strchr(line, '#')) != NULL)
 			*p = 0;
@@ -205,6 +219,7 @@ int readconfig(config_t *config, char *filename, char *section)
 			}
 		}
 		
+	free(line);
 	fclose (fp);
 	if (*section != 0  &&  sectioncount == 0)
 		havesection = 1;