Allow pip install from git

Merged with modifications from a815269010

MySQLdb/constants/CLIENT.py

@@ -0,0 +1,29 @@
+"""MySQL CLIENT constants
+
+These constants are used when creating the connection. Use bitwise-OR
+(|) to combine options together, and pass them as the client_flags
+parameter to MySQLdb.Connection. For more information on these flags,
+see the MySQL C API documentation for mysql_real_connect().
+
+"""
+
+LONG_PASSWORD = 1
+FOUND_ROWS = 2
+LONG_FLAG = 4
+CONNECT_WITH_DB = 8
+NO_SCHEMA = 16
+COMPRESS = 32
+ODBC = 64
+LOCAL_FILES = 128
+IGNORE_SPACE = 256
+CHANGE_USER = 512
+INTERACTIVE = 1024
+SSL = 2048
+IGNORE_SIGPIPE = 4096
+TRANSACTIONS = 8192 # mysql_com.h was WRONG prior to 3.23.35
+RESERVED = 16384
+SECURE_CONNECTION = 32768
+MULTI_STATEMENTS = 65536
+MULTI_RESULTS = 131072
+
+