Rename PostgreSQL SSL config variables

e.g. s/sslmode/ssl_mode/g to conform with borgmatic naming conventions.

borgmatic/config/schema.yaml

@@ -556,7 +556,7 @@ map:
                                 documentation for details. Note that format is
                                 ignored when the database name is "all".
                             example: directory
-                        sslmode:
+                        ssl_mode:
                             type: str
                             enum: ['disable', 'allow', 'prefer', 'require', 'verify-ca', 'verify-full']
                             desc: |
@@ -564,22 +564,22 @@ map:
                                 "require", "verify-ca" or "verify-full". Defaults to "disable". See
                                 https://www.postgresql.org/docs/current/libpq-ssl.html for details.
                             example: disable
-                        sslcert:
+                        ssl_cert:
                             type: str
                             desc: |
                                 Path to a client certificate.
                             example: "/root/.postgresql/postgresql.crt"
-                        sslkey:
+                        ssl_key:
                             type: str
                             desc: |
                                 Path to a private client key.
                             example: "/root/.postgresql/postgresql.key"
-                        sslrootcert:
+                        ssl_root_cert:
                             type: str
                             desc: |
                                 Path to a root certificate containing a list of trusted certificate authorities.
                             example: "/root/.postgresql/root.crt"
-                        sslcrl:
+                        ssl_crl:
                             type: str
                             desc: |
                                 Path to a certificate revocation list.

borgmatic/hooks/postgresql.py

@@ -22,15 +22,15 @@ def make_extra_environment(database):
     extra = dict()
     if 'password' in database:
         extra['PGPASSWORD'] = database['password']
-    extra['PGSSLMODE'] = database.get('sslmode', 'disable')
-    if 'sslcert' in database:
-        extra['PGSSLCERT'] = database['sslcert']
-    if 'sslkey' in database:
-        extra['PGSSLKEY'] = database['sslkey']
-    if 'sslrootcert' in database:
-        extra['PGSSLROOTCERT'] = database['sslrootcert']
-    if 'sslcrl' in database:
-        extra['PGSSLCRL'] = database['sslcrl']
+    extra['PGSSLMODE'] = database.get('ssl_mode', 'disable')
+    if 'ssl_cert' in database:
+        extra['PGSSLCERT'] = database['ssl_cert']
+    if 'ssl_key' in database:
+        extra['PGSSLKEY'] = database['ssl_key']
+    if 'ssl_root_cert' in database:
+        extra['PGSSLROOTCERT'] = database['ssl_root_cert']
+    if 'ssl_crl' in database:
+        extra['PGSSLCRL'] = database['ssl_crl']
     return extra