allow hex and octal strings in dbPut

Setting EPICS_DB_CONVERT_DECIMAL_ONLY turns dbPut/dbGet
string to integer conversions back the the old decimal only
policy.

modules/libcom/src/misc/epicsConvert.c

@@ -33,3 +33,5 @@ LIBCOM_API float epicsConvertDoubleToFloat(double value)
 
     return (float) value;
 }
+
+int dbConvertBase = 0;

modules/libcom/src/misc/epicsConvert.h

@@ -20,6 +20,12 @@ extern "C" {
 
 LIBCOM_API float epicsConvertDoubleToFloat(double value);
 
+/* dbConvertBase is used in dbPut and dbGet string to integer conversions.
+   It defaults to 0 but is set to 10 if the EPICS_DB_CONVERT_DECIMAL_ONLY
+   environment variable is set.
+*/
+LIBCOM_API extern int dbConvertBase;
+
 #ifdef __cplusplus
 }
 #endif