Add alembic script that adds contact user_agent and endpoint message_context.

........

Merged revisions 411514 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@420236 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/ast-db-manage/config/versions/3855ee4e5f85_add_missing_pjsip_options.py

+"""add_missing_pjsip_options
+
+Revision ID: 3855ee4e5f85
+Revises: 4c573e7135bd
+Create Date: 2014-03-28 10:49:04.637730
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '3855ee4e5f85'
+down_revision = '4c573e7135bd'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column('ps_endpoints', sa.Column('message_context', sa.String(40)))
+    op.add_column('ps_contacts', sa.Column('user_agent', sa.String(40)))
+
+
+def downgrade():
+    op.drop_column('ps_contacts', 'user_agent')
+    op.drop_column('ps_endpoints', 'message_context')