Config file should not be required to run doltgres, and command line flags like `-host` and `-port` should be resurrected.

Doltgres `v0.7.5` requires a configuration file and removed support for `-host` and `-port`. This is a bug, command line options _or_ a config file should be required.

We should match postgres:
```
$ postgres --help
postgres is the PostgreSQL server.

Usage:
postgres [OPTION]...

Options:
-B NBUFFERS number of shared buffers
-c NAME=VALUE set run-time parameter
-C NAME print value of run-time parameter, then exit
-d 1-5 debugging level
-D DATADIR database directory
-e use European date input format (DMY)
-F turn fsync off
-h HOSTNAME host name or IP address to listen on
-i enable TCP/IP connections
-k DIRECTORY Unix-domain socket location
-l enable SSL connections
-N MAX-CONNECT maximum number of allowed connections
-p PORT port number to listen on
-s show statistics after each query
-S WORK-MEM set amount of memory for sorts (in kB)
-V, --version output version information, then exit
--NAME=VALUE set run-time parameter
--describe-config describe configuration parameters, then exit
-?, --help show this help, then exit

Developer options:
-f s|i|o|b|t|n|m|h forbid use of some plan types
-n do not reinitialize shared memory after abnormal exit
-O allow system table structure changes
-P disable system indexes
-t pa|pl|ex show timings after each query
-T send SIGSTOP to all backend processes if one dies
-W NUM wait NUM seconds to allow attach from a debugger

Options for single-user mode:
--single selects single-user mode (must be first argument)
DBNAME database name (defaults to user name)
-d 0-5 override debugging level
-E echo statement before execution
-j do not use newline as interactive query delimiter
-r FILENAME send stdout and stderr to given file

Options for bootstrapping mode:
--boot selects bootstrapping mode (must be first argument)
--check selects check mode (must be first argument)
DBNAME database name (mandatory argument in bootstrapping mode)
-r FILENAME send stdout and stderr to given file

Please read the documentation for the complete list of run-time
configuration settings and how to set them on the command line or in
the configuration file.

Report bugs to .
PostgreSQL home page:
```