Automatically convert a v1-style ca_serialno to the v2 config style.

This has been annoying for developers who switch back and forth. It will
still break v1 but at least going from v1 to v2 will work seemlessly.

ticket 240

ipaserver/install/certs.py

@@ -34,7 +34,7 @@ from ipapython import sysrestore
 from ipapython import ipautil
 from ipapython import certmonger
 from ipalib import pkcs10
-from ConfigParser import RawConfigParser
+from ConfigParser import RawConfigParser, MissingSectionHeaderError
 import service
 from ipalib import x509
 from ipalib.errors import CertificateOperationError
@@ -105,6 +105,18 @@ def next_serial(serial_file=CA_SERIALNO):
             cur_serial = serial + 1
         except IOError, e:
             raise RuntimeError("Unable to determine serial number: %s" % str(e))
+        except MissingSectionHeaderError:
+            fcntl.flock(fp.fileno(), fcntl.LOCK_UN)
+            fp.close()
+            f=open(serial_file,"r")
+            r = f.readline()
+            f.close()
+            cur_serial = int(r) + 1
+            fp = open(serial_file, "w")
+            fcntl.flock(fp.fileno(), fcntl.LOCK_EX)
+            parser.add_section('selfsign')
+            parser.set('selfsign', 'nextreplica', 500000)
+            parser.set('selfsign', 'replicainterval', 500000)
     else:
         fp = open(serial_file, "w")
         fcntl.flock(fp.fileno(), fcntl.LOCK_EX)