use getdelim instead of getline

Avoids weird macros to build on FreeBSD.

mdeliver.c

@@ -60,7 +60,7 @@ deliver(FILE *infile)
 		// skip to first "From " line
 		while (1) {
 			errno = 0;
-			ssize_t rd = getline(&line, &linelen, infile);
+			ssize_t rd = getdelim(&line, &linelen, '\n', infile);
 			if (rd == -1) {
 				if (errno == 0)
 					// invalid mbox file
@@ -98,7 +98,7 @@ tryagain:
 		int is_old = 0;
 		while (1) {
 			errno = 0;
-			ssize_t rd = getline(&line, &linelen, infile);
+			ssize_t rd = getdelim(&line, &linelen, '\n', infile);
 			if (rd == -1) {
 				if (errno != 0)
 					return -1;

mexport.c

@@ -62,7 +62,7 @@ export(char *file)
 
 	while (1) {
 		errno = 0;
-		ssize_t rd = getline(&line, &linelen, infile);
+		ssize_t rd = getdelim(&line, &linelen, '\n', infile);
 		if (rd == -1) {
 			if (errno == 0)
 				break;

mmime.c

@@ -273,7 +273,7 @@ gen_build()
 	int intext = 0;
 
 	while (1) {
-		int read = getline(&line, &linelen, stdin);
+		int read = getdelim(&line, &linelen, '\n', stdin);
 		if (read == -1) {
 			if (feof(stdin))
 				break;

mseq.c

@@ -205,7 +205,7 @@ stdinmode()
 		outfile = stdout;
 	}
 
-	while ((rd = getline(&line, &linelen, stdin)) != -1) {
+	while ((rd = getdelim(&line, &linelen, '\n', stdin)) != -1) {
 		if (line[rd-1] == '\n')
 			line[rd-1] = 0;